Zircon compatible glasses for down draw

BACKGROUND

0001Ion-exchangeable glasses can be manufactured in several forms by a variety of processes. In particular, such glasses can be drawn into thin sheets via either slot-draw or fusion-draw processes.

0002Current fusion-draw designs require zircon refractory lining and hardware for isopipes. Most ion-exchangeable glasses react with the zircon, breaking it down into silica, which dissolves in the glass, and zirconia, which forms solid inclusions that are entrained by flow into the molten glass and ends up in the final product. The attack of zircon by the molten glass continues over time and the level or concentration of zirconia inclusions in the glass increases. Because these inclusions are concentrated on the fusion line, they are also located at the point of maximum central tension after ion exchange, potentially compromising the strength of the ion-exchanged glass part. Moreover, in applications, such as in hand-held electronic devices such as PDAs, mobile phones, etc., in which small pixels of light are to be directed through the glass sheet, the high refractive index of the zirconia inclusions can block pixels. In very thin (e.g., ≤ 1mm thick) glass sheets, the zirconia inclusions are visible to the human eye, and constitute cosmetic defects that, in some instances, result in rejection of the part.

0003Various ion exchangeable glasses are, for example disclosed in <patcit id="pcit0001" dnum="US20090142568A1"><text>US 2009/0142568 A1</text></patcit>, <patcit id="pcit0002" dnum="WO9948824A1"><text>WO 99/48824 A1</text></patcit>, <patcit id="pcit0003" dnum="WO02051764A2"><text>WO 02/051764 A2</text></patcit> and <patcit id="pcit0004" dnum="WO0149620A2"><text>WO 01/49620 A2</text></patcit>.

SUMMARY

0004What is provided and described herein is a glass that is down-drawable and ion exchangeable. The glass has a temperature T^35kp at which the viscosity is 3.5 kPa•s (35 kilopoise. T^35kp) is less than the breakdown temperature T^breakdown of zircon.

0005Accordingly, one aspect of the disclosure is to provide a glass. The glass comprises SiO₂ and Na₂O and has a temperature T^35kp at which the glass has a viscosity of 35 kpoise, wherein the temperature T^breakdown at which zircon breaks down to form ZrO₂ and SiO₂ is greater than T^35kp

0006The glass consists essentially of 61 mol % ≤ SiO₂ ≤ 75 mol%; 7 mol % ≤ Al₂O₃ ≤ 15 mol%; 0 mol% ≤ B₂O₃ ≤ 12 mol%; 9 mol % ≤ Na₂O ≤ 21 mol%; 0 mol % ≤ K₂O ≤ 4 mol%; 0 mol% ≤ MgO ≤ 7 mol%; 0 mol% ≤ CaO ≤ 3 mol% and optionally at least one fining agent and has a temperature T^35kp at which the glass has a viscosity of 3.5 k Pa•s (35 kpoise), wherein the temperature T^breakdown at which zircon breaks down to form ZrO₂ and SiO₂ is greater than T^35kp. The glass further has a temperature T^margin = T^breakdown - T^35kp, wherein T^margin = 446.6 - 50.2[Al₂O₃] + 22.6[B₂O₃] - 4.4[Na₂O] - 3.9[K₂O] - 1.2([MgO]+[CaO]) where concentrations [Al₂O₃], [B₂O₃], [Na₂O], [K₂O], [MgO], and [CaO] are expressed in mol%, and wherein T^margin ≥ 0

0007A further aspect of the disclosure is a fusion-drawn glass sheet that is substantially free of fusion line zirconia defects.

0008These and other aspects, advantages, and salient features will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

0009<ul id="ul0001" list-style="none"><li><figref idref="f0001">FIGURE 1</figref> is a plot of measured vs. predicted zircon breakdown temperature T^breakdown;</li><li><figref idref="f0002">FIGURE 2</figref> is a plot of measured values vs. predicted 35kp temperatures T^35kp;</li><li><figref idref="f0003">FIGURE 3</figref> is a backscattered electron micrograph of a mixture of zircon and a glass composition (composition 5, Table 1) following heat treatment at 1175°C for 114 hours; and</li><li><figref idref="f0004">FIGURE 4</figref> is a backscattered electron micrograph of a mixture of zircon and a glass composition (composition 11, Table 1) following heat treatment at 1175°C for 114 hours.</li></ul>

DETAILED DESCRIPTION

0010In the following description, like reference characters designate like or corresponding parts throughout the several views shown in the figures. It is also understood that, unless otherwise specified, terms such as "top," "bottom," "outward," "inward," and the like are words of convenience and are not to be construed as limiting terms. In addition, whenever a group is described as comprising at least one of a group of elements and combinations thereof, it is understood that the group may comprise, consist essentially of, or consist of any number of those elements recited, either individually or in combination with each other. Similarly, whenever a group is described as consisting of at least one of a group of elements or combinations thereof, it is understood that the group may consist of any number of those elements recited, either individually or in combination with each other. Unless otherwise specified, a range of values, when recited, includes both the upper and lower limits of the range.

0011Referring to the drawings in general, it will be understood that the illustrations are for the purpose of describing particular embodiments and are not intended to limit the disclosure or appended claims thereto. The drawings are not necessarily to scale, and certain features and certain views of the drawings may be shown exaggerated in scale or in schematic in the interest of clarity and conciseness.

0012If the temperature at which the zircon in the isopipe breaks down to form zirconia and silica (also referred to herein as the "breakdown temperature" or "T^breakdown") were higher than any temperature seen on the isopipe, the problem of zirconia inclusions in fusion-drawn glass (also referred to as "fusion line zirconia") would not occur. In this instance, the temperatures used to form the glass over the isopipe would be too low to create zirconia, and no such defect could form in the glass.

0013Because fusion is essentially an isoviscous process, the highest temperature seen by the glass corresponds to a particular viscosity of the glass. In those standard fusion-draw operations known in the art, this viscosity is about 3,500 Pa•s (35,000 poise) (3.5 k Pa•s ("35 kpoise" or "35 kp")), although the viscosity can be as low as about 1,600 Pa•s 16,000 poise during brief periods when an isopipe is being initially wet by glass. We define the difference between the breakdown temperature and the temperature corresponding to 3,500 Pa•s (35,000 poise) viscosity as the breakdown margin T^margin, where: <maths id="math0001" num="(1)"><math display="block"><msup><mi mathvariant="normal">T</mi><mi>margin</mi></msup><mo>=</mo><msup><mi mathvariant="normal">T</mi><mi>breakdown</mi></msup><mo>−</mo><msup><mi mathvariant="normal">T</mi><mi>35kp</mi></msup><mo>,</mo></math><img file="EP2467339B1_D0001.tif" /></maths> where T^35kp is the temperature at which the viscosity of the glass is 3,500 Pa•s (35,000 poise).

0014When the breakdown margin T^margin is negative, zircon will breakdown to form zirconia defects at some location on the isopipe. When T^margin is zero, it is still possible that temperature excursions could cause zircon breakdown to occur. It is therefore desirable not only to make the breakdown margin positive, but to maximize T^margin as much as possible while being consistent with all the other attributes that must be maintained in the final glass product.

0015To understand the relationship between breakdown temperature and 35 kp temperature, it is helpful to consider the reaction to form zirconia from zircon. The reaction is written thus:         ZrSiO₄(xtal) → ZrO₂(xtal) + SiO₂(liq),     (2) where ZrSiO₄(xtal) and ZrO₂(xtal) are crystalline zircon and zirconia, respectively, and SiO₂(liq) is liquid silica, which dissolves into the glass, produced by reaction (2).

0016The breakdown of zircon can be prevented by driving reaction (2) to the left. To do so, the activity (i.e., the concentration) of at least one of ZrO₂ or SiO₂ in the glass is increased. To accomplish this via ZrO₂ addition, the concentration of ZrO₂ would have to be increased until zircon became the liquidus phase. This, however, would risk creating a new, unwanted defect, secondary zircon. The remaining option is to increase the activity/concentration of SiO₂ in the glass. As SiO₂ increases at the expense of other glass components, however, the glass viscosity increases as well. Thus, the rate at which breakdown temperature increases must be balanced against the rate at which the 3.5 k Pa•s (35 kp) temperature T^35kp increases.

0017In one aspect, a glass composition having a breakdown temperature T^breakdown that is higher than the 3.5 k Pa•s (35 kp) temperature T^35kp - i.e., T^breakdown > T^35kp - is provided. The breakdown temperature is preferably higher than any viscosity that might be obtained - however briefly - during normal operation of a fusion-draw process. The composition is, in one embodiment, meltable in a conventional electric-boost, zirconia or alumina-refractory tank; i.e., the melt temperature T^350p (i.e., the temperature corresponding to a viscosity of about 35 Pa•s (350 poise)) of the glass is less than about 1650°C.

0018In one embodiment, the glass described herein, in addition to being down-drawable and compatible with fusion-draw processes, is ion-exchangeable so as to produce a compressive layer on the glass surface of at least 20 µm in depth and having a maximum compressive stress of at least 350 MPa. In other embodiments, the glass is ion-exchangeable so as to produce a central tension within the glass of at least 10MPa. The glass consists essentially of: 61 mol % ≤ SiO₂ ≤ 75 mol%; 7 mol % ≤ Al₂O₃ ≤ 15 mol%; 0 mol% ≤ B₂O₃ ≤ 12 mol%; 9 mol % ≤ Na₂O ≤ 21 mol%; 0 mol % ≤ K₂O ≤ 4 mol%; 0 mol% ≤ MgO ≤ 7 mol%; and 0 mol% ≤ CaO ≤ 3 mol%. The glass optionally further comprises at least one fining agent such as, but not limited to, a halogen or a multivalent fining agent such as As₂O₃, Sb₂O₃, SnO₂, and Fe₂O₃. In a particular embodiment, the total concentration of As₂O₃ and Sb₂O₃, if either or both are present, is less than 500ppm by weight.

0019The breakdown margin T^margin of the glass is given by the expression <maths id="math0002" num="(3a)"><math display="block"><mtable columnalign="left"><mtr><mtd><msup><mi mathvariant="normal">T</mi><mi>margin</mi></msup><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>446.6</mn><mo>−</mo><mn>50.2</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>+</mo><mn>22.6</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>4.4</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>3.9</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>1.2</mn><mrow><mo>[</mo><mrow><mi>MgO</mi><mo>+</mo></mrow></mrow></mtd></mtr><mtr><mtd><mrow><mi>CaO</mi><mo>]</mo></mrow><mo>.</mo></mtd></mtr></mtable></math><img file="EP2467339B1_D0002.tif" /></maths> The SiO₂ concentration is substantially accounted for by difference from the other oxides and is therefore not included in this expression. When the condition in equation (3a) is satisfied, the breakdown temperature for zircon will be greater than the 3.5 k Pa•s (35kp) temperature of the glass (i.e., T^breakdown > T^35kp), and fusion-line zirconia defects can thus be avoided when the glass is formed over a zircon isopipe in the fusion process.

0020As can be seen from the regression coefficients in equation (3a), the only oxide that contributes positively to breakdown margin T^margin is B₂O₃. In order to avoid excessively low breakdown temperatures, lower SiO₂ concentrations require higher B₂O₃ concentrations, since SiO₂ is the strongest contributor to high breakdown temperatures.

0021Na₂O is the essential oxide component for facilitating ion exchange, as it is removed from the glass and replaced by larger monovalent cations such as, for example, K₂O during conventional ion exchange in a molten salt such as, for example, potassium nitrate (KNO₃). In order to obtain the minimum useful compressive stress, Na₂O ≥ 9 mol%.

0022While it is desirable that the glasses described herein be compatible with existing melting processes, alternative means of melting or alternative batch materials that would enable melting harder glasses may also be used to prepare these glasses. To keep melt temperatures from becoming too high, fluxes (e.g., B₂O₃, alkali oxides, and alkaline earth oxides) can be kept at relatively high levels with respect to the basic glass formers Al₂O₃ and SiO₂. This can be understood from the fact that the 3.5 k Pa•s (35 kp) and 35 Pa•s (350 p) temperatures "track" each other - i.e., a high 3.5 k Pa•s (35 kp) temperature also implies a high 35 Pa•s (350 p) temperature. From regression equation (5) for 3.5 k Pa•s (35 kp) (shown in paragraph [0032] below), high Al₂O₃ contents and, by inference, high SiO₂ contents lead to high 3.5 k Pa•s (35 kp) temperatures, and therefore to high melt temperatures. To avoid higher melt temperatures, it is desirable that B₂O₃ + Na₂O + K₂O + MgO + CaO ≥ 18 mol%. With the exception of MgO, all of the above components also contribute to low liquidus temperature, which ensures a liquidus viscosity that is high enough to be compatible with fusion-draw processes.

0023In one aspect, it is desirable that the liquidus temperature be as low as reasonably achievable to ensure a high liquidus viscosity. The relationship between liquidus temperature and composition is exceptionally complex, and no simple algorithm can be devised to account for it. However, liquidus temperature generally decreases as the concentration of alkali metal oxides in excess of aluminum (i.e., Na₂O + K₂O - Al₂O₃) increases, and as sodium is replaced by potassium, at least within the ranges indicated above. Likewise, liquidus temperature decreases steeply with increasing B₂O₃. Therefore, it is advantageous that B₂O₃ + Na₂O + K₂O - Al₂O₃ ≥ 0 to ensure that the glass have suitably low liquidus temperature.

0024The glasses described herein may be fusion drawn into sheets that can be used as cover plates, windows, casings, screens, touch panels, or the like, for mobile electronic devices, such as telephones, entertainment devices, including games, music players and the like; information terminal (IT) devices, such as laptop computers; and analogous stationary versions of such devices.

0025Zircon breakdown temperature can be experimentally determined by one of several methods. In one method, known as the gradient strip test, a glass sample of interest is crushed and sieved to obtain a size fraction of generally less than 20 mesh. A strip of 1390 zircon refractory (Cohart) is placed in the bottom of a long, narrow platinum boat and the crushed glass is placed on top of the zircon refractory. The boat containing the refractory and glass is then loaded into a conventional gradient tube furnace that has been calibrated so that the temperature at each point in the furnace can be mapped to a specific place along the length of the boat. The gradient is set such that the low end of the furnace is at a temperature in a range from about 750°C up to about 800°C, and the hot end is at a temperature in a range from about 1225°C up to about 1300°C. The boat remains in the furnace for one week. After one week in the furnace, the boat is removed and the glass/refractory slab is sectioned along its length and inspected. Zirconia inclusions in the glass can be distinguished from zircon using polarized light microscopy, and further confirmation can be obtained via scanning electron microscopy. Because the furnace temperature is known along the length of the sample, the location at which zirconia first appears corresponds to a particular temperature. The estimated uncertainty in the temperature is about ± 10°C.

0026Compositions of glasses evaluated by the gradient strip test method are shown in Table 1, and plotted vs. predicted breakdown temperature in <figref idref="f0001">FIG. 1</figref>. Compositions listed in Table 1 are expressed in mol%. In <figref idref="f0001">FIG. 1</figref>, the y-error bars denote the measurement uncertainty of 10°C, and the x-error bars denote the 2σ standard error - 15°C - of the regression equation. The compositions listed in Table 1 are expressed in mol% and, for most of the glasses listed, are the nominal compositions. The true compositions and nominal compositions should be close for most of the glasses listed in Table 1, but for the highest boron glasses the melting process itself may well have reduced the B₂O₃ content of the glasses. In several cases, the breakdown temperatures ("Breakdown T") were higher than the temperature at the hot end of the gradient furnace. In these instances, it can only be established that the breakdown temperature T^breakdown was higher than the temperature of the hot end, and a unique temperature for T^breakdown cannot be assigned. For three of the samples (25, 26, 27) listed in Table 1, the high coefficient of thermal expansion of the glasses caused heavy crizzling or crazing of the glass at the glass-refractory interface. Consequently, it could only be determined that, for these samples, zirconia was present at up to about 1100°C, but the temperature (presumably lower) at which zircon became stable could not be determined.

0027Table 1 also lists predicted breakdown temperatures that were obtained by linear regression of the breakdown temperature against the mole fractions of all the major element oxides except SnO₂ (frequently present at a low level as a fining agent and SiO₂. SiO₂ was left out of the regression because its concentration is substantially accounted for by difference from the other oxides. The regression equation describing breakdown temperature vs. composition is as follows: <maths id="math0003" num="(4)"><math display="block"><mtable><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>breakdown</mi></msup><mfenced><mi>predicted</mi></mfenced><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>2095.1</mn><mo>−</mo><mn>24.0</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>8.5</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>33.6</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>46.2</mn><mrow><mo>[</mo><mrow><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi><mo>−</mo><mn>24.7</mn><mfenced open="[" close="]"><mi>MgO</mi></mfenced><mo>−</mo><mn>23.9</mn><mfenced open="[" close="]"><mi>CaO</mi></mfenced></mrow></mrow><mo>,</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0003.tif" /></maths> where the concentrations in brackets are expressed in mol%. The coefficients in equation (4) have been further refined to yield the expression: <maths id="math0004" num="(4a)"><math display="block"><mtable><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>breakdown</mi></msup><mfenced><mi>predicted</mi></mfenced><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>2008.8</mn><mo>−</mo><mn>23.5</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>1.6</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>33.6</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>45.5</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>10.5</mn><mfenced open="[" close="]"><mi>MgO+CaO</mi></mfenced><mo>.</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0004.tif" /></maths> The standard error of the regression in equations (4) and (4a) is about 7.3°C. The 2σ uncertainty is therefore about 15°C, which is close to the estimated uncertainty of the measurement itself.

0028Zircon breakdown temperature can also be experimentally determined by the isothermal hold technique. In this method, glass samples are placed in small platinum boats containing zircon refractory and held at a fixed temperature for a one week duration. While the isothermal hold method does not provide a unique temperature for zircon breakdown, it does serve as a screening tool. If it is known in advance that the breakdown temperature must be higher than a threshold value, then simply holding the glass sample and several other compositions simultaneously at the threshold temperature can be used to identify those samples having breakdown temperatures either above or below the threshold temperature.

0029Results of isothermal hold tests for glass compositions are listed in Table 2. Compositions listed in Table 2 are expressed in mol%. For nearly all of the samples listed, the compositions in Table 2 are nominal rather than measured values. The breakdown temperature of a sample cannot be uniquely determined via this technique. However, if zirconia is not observed, the breakdown temperature must be greater than the hold temperature. Likewise, if zirconia is observed, then the breakdown temperature must be lower than the isothermal hold temperature. The "sense" of the breakdown temperature relative to the hold temperature (i.e., greater or less than the hold temperature listed under "Breakdown T" in Table 2) is indicated in Table 2. The breakdown temperature calculated using the model previously described herein is also shown for comparison. For 75 samples listed in Table 2, the predicted breakdown temperature has the correct sense relative to the hold temperature; i.e., if the predicted temperature is greater than the hold temperature, then no zirconia is seen. Likewise, if the predicted temperature is less than the hold temperature, then varying amounts of zirconia is observed.

0030The difference between conventional glass having a low breakdown temperature and a glass having a high breakdown temperature, such as those disclosed herein is illustrated in <figref idref="f0003">FIGS. 3</figref> and <figref idref="f0004">4</figref>. <figref idref="f0003">FIG. 3</figref> shows a backscattered electron micrograph of a glass composition (composition 5 in Table 1) having a low breakdown temperature, and <figref idref="f0004">FIG. 4</figref> shows a backscattered electron micrograph of a glass compositions (composition 11 in Table 1) having a high zircon breakdown temperature. Both glasses were mixed with zircon grains and loaded into Pt boats, which were then placed in a furnace at 1175°C for 114 hrs. The samples were then removed form the furnace, air quenched, and later cut and polished for inspection. As seen in <figref idref="f0003">FIG. 3</figref>, the sample containing glass composition 5, which has a breakdown temperature of 1105°C, clearly shows zirconia grains resulting from zircon breakdown. The zircon has reacted with the glass, as evidenced by the decoration of each of the zircon grains 310 (the grey phase in <figref idref="f0003">FIG. 3</figref>) with a large number of smaller zirconia grains 330 (white phase) just inside the glass 320 (dark phase). In contrast, the sample containing glass composition 11, which has a breakdown temperature of 1180°C, did not undergo zircon breakdown. <figref idref="f0004">FIG. 4</figref> shows that zircon grains 310 and glass are present, but no zirconia grains were observed.

0031Relative amounts of zirconia observed for each sample are also listed in Table 2, and are described in relative amounts ("High," Medium," "Trace," and "None"). The relative amounts of zirconia observed also track the breakdown temperature. If T^breakdown is predicted to be much lower than the hold temperature, a large amount of zirconia is observed. When the predicted T^breakdown is close to the isothermal hold temperature, only a trace of zirconia is observed. In the last ten samples listed in Table 2, the predicted sense of the breakdown temperature is not the same as observed, but all are within 2σ of the predicted breakdown temperature, and hence within the uncertainty of the prediction.

0032Two deficiencies are associated with the gradient strip and isothermal hold tests. First, the long exposures at high temperature that are used in both tests can produce volatilization of certain glass components - particularly B₂O₃ - which can in turn impact the breakdown temperature of the glass. As discussed hereinabove, an increase in SiO₂ causes the breakdown temperature to increase. Since SiO₂ typically comprises more than 60 mol% of all the oxides present in the glasses described herein, the absolute SiO₂ concentration in the glass increases the most when a volatile component such as B₂O₃ is lost. Furthermore, at least one volatile component from a glass containing both Na₂O and B₂O₃ is Na₂B₄O₇, so both sodium and boron can be lost. Thus, the breakdown temperature for a glass having a high B₂O₃ concentration is likely to be an overestimate of the actual T^breakdown and the glass composition should be verified following the test. Second, the breakdown of zircon is very slow. Consequently, the one week hold time used in both types of tests may in some cases be insufficient to reveal an observable degree of breakdown. In general, both of these problems lead to observation of higher-than-expected breakdown temperatures.

0033Viscosity measurements were separately performed on a broad composition range of ion-exchangeable glasses. When the temperature is regressed to the temperature at which the viscosity of the glass is 3,500 Pa•s (35,000 poise) (T^35kp), a linear correlation with composition is obtained: <maths id="math0005" num="(5)"><math display="block"><mtable><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>35kp</mi></msup><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>1484.5</mn><mo>+</mo><mn>17.1</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>18.4</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>30.1</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>26.0</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>+</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>0.9</mn><mfenced open="[" close="]"><mi>MgO</mi></mfenced><mo>−</mo><mn>58.1</mn><mfenced open="[" close="]"><mi>CaO</mi></mfenced><mo>,</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0005.tif" /></maths> with a standard error of 5.8°C, and thus a propagated 2σ uncertainty of 11.6°C. Measured values of T^35kp are plotted against predicted 3.5 k Pa•s (35 kp) temperatures in <figref idref="f0002">FIG. 2</figref>, and show good correlation between values predicted in equation (5) and measured values. The coefficients in equation (5) have been further refined to yield the expression: <maths id="math0006" num="(5a)"><math display="block"><mtable><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>35kp</mi></msup><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>1562.2</mn><mo>+</mo><mn>26.7</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>24.2</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>38</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>41.6</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>9.3</mn><mrow><mo>[</mo><mi>MgO</mi></mrow></mrow></mtd></mtr><mtr><mtd><mrow><mrow><mrow><mo>+</mo><mi>CaO</mi></mrow><mo>]</mo></mrow><mo>.</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0006.tif" /></maths>

0034Since the breakdown temperature T^breakdown exceeds the 3.5 k Pa•s (35kp) temperature T^35kp, equations (1), (4), and (5) are combined to give equation (3): <maths id="math0007" num="(3)"><math display="block"><mtable><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>margin</mi></msup><mo>=</mo><mn>610.6</mn><mo>−</mo><mn>41.0</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>+</mo><mn>9.9</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>3.5</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>20.2</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>25.6</mn><mfenced open="[" close="]"><mi>MgO</mi></mfenced><mo>+</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>34.2</mn><mfenced open="[" close="]"><mi>CaO</mi></mfenced><mo>.</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0007.tif" /></maths> The coefficients in equation (3) have been further refined to yield equation (3a): <maths id="math0008" num="(3a)"><math display="block"><mtable columnalign="left"><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>margin</mi></msup><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>446.6</mn><mo>−</mo><mn>50.2</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>+</mo><mn>22.6</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>4.4</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>3.9</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>1.2</mn><mrow><mo>[</mo><mi>MgO</mi></mrow><mo>+</mo></mrow></mtd></mtr><mtr><mtd><mrow><mrow><mi>CaO</mi><mo>]</mo></mrow><mo>.</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0008.tif" /></maths> Exemplary glasses that satisfy equation (3) are listed in Table 3. Compositions listed in Table 3 are expressed in mol%.

0035In some embodiments, it is desirable that the zircon breakdown temperature is as high as possible, and preferably a temperature that is greater than any experienced on the isopipe. The propagated 2σ uncertainty is 19°C. To ensure that the breakdown temperature will be greater than any temperature in the isopipe, 19°C can be subtracted from the regression coefficient in equations (3) and (3a) to account for any uncertainty: <maths id="math0009" num="(6)"><math display="block"><mtable><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>margin</mi></msup><mo>=</mo><mn>591.6</mn><mo>−</mo><mn>41.0</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>+</mo><mn>9.9</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>3.5</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>20.2</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>25.6</mn><mfenced open="[" close="]"><mi>MgO</mi></mfenced><mo>+</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>34.2</mn><mfenced open="[" close="]"><mi>CaO</mi></mfenced><mo>,</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0009.tif" /></maths><maths id="math0010" num="(6a)"><math display="block"><mtable columnalign="left"><mtr><mtd><mrow><msup><mi mathvariant="normal">T</mi><mi>margin</mi></msup><mfenced separators=""><mo>°</mo><mi mathvariant="normal">C</mi></mfenced><mo>=</mo><mn>427.6</mn><mo>−</mo><mn>50.2</mn><mfenced open="[" close="]" separators=""><msub><mi>Al</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>+</mo><mn>22.6</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">B</mi><mi mathvariant="normal">2</mi></msub><msub><mi mathvariant="normal">O</mi><mi mathvariant="normal">3</mi></msub></mfenced><mo>−</mo><mn>4.4</mn><mfenced open="[" close="]" separators=""><msub><mi>Na</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>3.9</mn><mfenced open="[" close="]" separators=""><msub><mi mathvariant="normal">K</mi><mi mathvariant="normal">2</mi></msub><mi mathvariant="normal">O</mi></mfenced><mo>−</mo><mn>1.2</mn><mrow><mo>[</mo><mi>MgO</mi></mrow><mo>+</mo></mrow></mtd></mtr><mtr><mtd><mrow><mrow><mi>CaO</mi><mo>]</mo></mrow><mo>.</mo></mrow></mtd></mtr></mtable></math><img file="EP2467339B1_D0010.tif" /></maths>

0036There is, however, sufficient flexibility in the fusion process to deliver glass at viscosities that are both lower and higher than 3.5 k Pa•s (35kp). Equation (3) could therefore be adopted, aiming for as high a breakdown margin T^margin as possible. The glass delivery temperature could then be adjusted if the required product attributes do not produce a predicted breakdown margin T^margin of greater than 19°C.

0037The glass compositions listed in Table 3 have a 35 Pa•s (350 poise) temperature T³⁵⁰ (i.e., the temperature at which the glass is typically melted) that is less than or equal to 1650°C, which is desirable for reducing gaseous and solid inclusions at production scale melt rates. In addition, all of the compositions are ion exchangeable by those methods widely known in the art. In the ion exchange process, smaller metal ions in the glass are replaced or "exchanged" by larger metal ions of the same valence within a layer that is close to the outer surface of the glass. The replacement of smaller ions with larger ions creates a compressive stress within the layer. In one embodiment, the metal ions are monovalent alkali metal ions (e.g., Na⁺, K⁺, Rb⁺, and the like), and ion exchange is accomplished by immersing the glass in a bath comprising at least one molten salt of the larger metal ion that is to replace the smaller metal ion in the glass. Alternatively, other monovalent ions such as Ag⁺, Tl⁺, Cu⁺, and the like may be exchanged for monovalent ions. The ion exchange process or processes that are used to strengthen the glass can include, but are not limited to, immersion in a single bath or multiple baths of like or different compositions with washing and/or annealing steps between immersions.

0038In one embodiment, the glasses listed in Table 3 are ion exchanged by exposure to molten KNO₃ at a temperature of 410°C for 8 hours to produce a compressive stress layer having a depth (also referred to as a "depth of layer") of at least 20 µm on the surface of the glass and a maximum compressive stress of at least 350 MPa. In another embodiment the glasses listed in Table 3 are ion exchanged to achieve a central tension of at least 10 MPa. <tables id="tabl0001" num="0001"><table frame="none"><title>Table 1. Gradient strip zircon breakdown temperatures.</title><tgroup cols="12" colsep="0" rowsep="0"><colspec colnum="1" colname="col1" colwidth="17mm" /><colspec colnum="2" colname="col2" colwidth="14mm" /><colspec colnum="3" colname="col3" colwidth="14mm" /><colspec colnum="4" colname="col4" colwidth="13mm" /><colspec colnum="5" colname="col5" colwidth="14mm" /><colspec colnum="6" colname="col6" colwidth="12mm" /><colspec colnum="7" colname="col7" colwidth="13mm" /><colspec colnum="8" colname="col8" colwidth="12mm" /><colspec colnum="9" colname="col9" colwidth="14mm" /><colspec colnum="10" colname="col10" colwidth="29mm" /><colspec colnum="11" colname="col11" colwidth="42mm" /><colspec colnum="12" colname="col12" colwidth="38mm" /><thead><row><entry>Sample</entry><entry align="center">SiO₂</entry><entry align="center">Al₂O₃</entry><entry align="center">B₂O₃</entry><entry align="center">Na₂O</entry><entry align="center">K₂O</entry><entry align="center">MgO</entry><entry align="center">CaO</entry><entry align="center">SnO₂</entry><entry align="center">Breakdown T(°C)</entry><entry align="center">Predicted breakdown T(°C)</entry><entry align="center">Breakdown margin (°C)</entry></row></thead><tbody><row><entry valign="bottom">1</entry><entry align="center" valign="bottom">61.94</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1095</entry><entry align="center" valign="bottom">1096</entry><entry align="center" valign="bottom">-46</entry></row><row><entry valign="bottom">2</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">15.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1115</entry><entry align="center" valign="bottom">1126</entry><entry align="center" valign="bottom">81</entry></row><row><entry valign="bottom">3</entry><entry align="center" valign="bottom">64.09</entry><entry align="center" valign="bottom">13.2</entry><entry align="center" valign="bottom">5.66</entry><entry align="center" valign="bottom">12.25</entry><entry align="center" valign="bottom">2.83</entry><entry align="center" valign="bottom">1.89</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.09</entry><entry align="center" valign="bottom">1140</entry><entry align="center" valign="bottom">1141</entry><entry align="center" valign="bottom">-24</entry></row><row><entry valign="bottom">4</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1150</entry><entry align="center" valign="bottom">1144</entry><entry align="center" valign="bottom">37</entry></row><row><entry valign="bottom">5</entry><entry align="center" valign="bottom">66.12</entry><entry align="center" valign="bottom">10.19</entry><entry align="center" valign="bottom">0.58</entry><entry align="center" valign="bottom">14.16</entry><entry align="center" valign="bottom">2.37</entry><entry align="center" valign="bottom">5.75</entry><entry align="center" valign="bottom">0.59</entry><entry align="center" valign="bottom">0.21</entry><entry align="center" valign="bottom">1105</entry><entry align="center" valign="bottom">1103</entry><entry align="center" valign="bottom">-27</entry></row><row><entry valign="bottom">6</entry><entry align="center" valign="bottom">66.01</entry><entry align="center" valign="bottom">11.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.2</entry><entry align="center" valign="bottom">1.35</entry><entry align="center" valign="bottom">4.76</entry><entry align="center" valign="bottom">1.61</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">1120</entry><entry align="center" valign="bottom">1124</entry><entry align="center" valign="bottom">10</entry></row><row><entry valign="bottom">7</entry><entry align="center" valign="bottom">67.34</entry><entry align="center" valign="bottom">12.33</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">20.33</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1125</entry><entry align="center" valign="bottom">1115</entry><entry align="center" valign="bottom">32</entry></row><row><entry valign="bottom">8</entry><entry align="center" valign="bottom">67.85</entry><entry align="center" valign="bottom">9.21</entry><entry align="center" valign="bottom">0.54</entry><entry align="center" valign="bottom">14.16</entry><entry align="center" valign="bottom">2.34</entry><entry align="center" valign="bottom">5.22</entry><entry align="center" valign="bottom">0.46</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">1140</entry><entry align="center" valign="bottom">1145</entry><entry align="center" valign="bottom">23</entry></row><row><entry valign="bottom">9</entry><entry align="center" valign="bottom">64.8</entry><entry align="center" valign="bottom">12.8</entry><entry align="center" valign="bottom">4.8</entry><entry align="center" valign="bottom">17.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1150</entry><entry align="center" valign="bottom">1155</entry><entry align="center" valign="bottom">70</entry></row><row><entry valign="bottom">10</entry><entry align="center" valign="bottom">68.07</entry><entry align="center" valign="bottom">9.72</entry><entry align="center" valign="bottom">0.57</entry><entry align="center" valign="bottom">13.21</entry><entry align="center" valign="bottom">2.31</entry><entry align="center" valign="bottom">5.39</entry><entry align="center" valign="bottom">0.54</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1160</entry><entry align="center" valign="bottom">1160</entry><entry align="center" valign="bottom">4</entry></row><row><entry valign="bottom">11</entry><entry align="center" valign="bottom">68.68</entry><entry align="center" valign="bottom">9.54</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.92</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1180</entry><entry align="center" valign="bottom">1178</entry><entry align="center" valign="bottom">16</entry></row><row><entry valign="bottom">12</entry><entry align="center" valign="bottom">69.25</entry><entry align="center" valign="bottom">9.03</entry><entry align="center" valign="bottom">0.39</entry><entry align="center" valign="bottom">13.41</entry><entry align="center" valign="bottom">2.21</entry><entry align="center" valign="bottom">5.04</entry><entry align="center" valign="bottom">0.47</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1185</entry><entry align="center" valign="bottom">1186</entry><entry align="center" valign="bottom">39</entry></row><row><entry valign="bottom">13</entry><entry align="center" valign="bottom">62.26</entry><entry align="center" valign="bottom">13.27</entry><entry align="center" valign="bottom">9.6</entry><entry align="center" valign="bottom">14.87</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1195</entry><entry align="center" valign="bottom">1195</entry><entry align="center" valign="bottom">108</entry></row><row><entry valign="bottom">14</entry><entry align="center" valign="bottom">70.25</entry><entry align="center" valign="bottom">8.86</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.43</entry><entry align="center" valign="bottom">1.67</entry><entry align="center" valign="bottom">5.18</entry><entry align="center" valign="bottom">0.41</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">1210</entry><entry align="center" valign="bottom">1216</entry><entry align="center" valign="bottom">47</entry></row><row><entry valign="bottom">15</entry><entry align="center" valign="bottom">70.19</entry><entry align="center" valign="bottom">8.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.28</entry><entry align="center" valign="bottom">1.19</entry><entry align="center" valign="bottom">5.1</entry><entry align="center" valign="bottom">0.44</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1217</entry><entry align="center" valign="bottom">67</entry></row><row><entry valign="bottom">16</entry><entry align="center" valign="bottom">70.72</entry><entry align="center" valign="bottom">8.67</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">5.19</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">34</entry></row><row><entry valign="bottom">17</entry><entry align="center" valign="bottom">69.96</entry><entry align="center" valign="bottom">8.60</entry><entry align="center" valign="bottom">0.55</entry><entry align="center" valign="bottom">14.03</entry><entry align="center" valign="bottom">1.21</entry><entry align="center" valign="bottom">4.97</entry><entry align="center" valign="bottom">0.45</entry><entry align="center" valign="bottom">0.20</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1222</entry><entry align="center" valign="bottom">77</entry></row><row><entry valign="bottom">18</entry><entry align="center" valign="bottom">69.85</entry><entry align="center" valign="bottom">8.71</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">14.27</entry><entry align="center" valign="bottom">1.26</entry><entry align="center" valign="bottom">5.18</entry><entry align="center" valign="bottom">0.47</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">1200</entry><entry align="center" valign="bottom">1208</entry><entry align="center" valign="bottom">61</entry></row><row><entry valign="bottom">19</entry><entry align="center" valign="bottom">69.86</entry><entry align="center" valign="bottom">8.65</entry><entry align="center" valign="bottom">0.03</entry><entry align="center" valign="bottom">14.17</entry><entry align="center" valign="bottom">1.2</entry><entry align="center" valign="bottom">5.05</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">1219</entry><entry align="center" valign="bottom">69</entry></row><row><entry valign="bottom">20</entry><entry align="center" valign="bottom">70.11</entry><entry align="center" valign="bottom">8.68</entry><entry align="center" valign="bottom">0.03</entry><entry align="center" valign="bottom">14.22</entry><entry align="center" valign="bottom">1.2</entry><entry align="center" valign="bottom">5.06</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1216</entry><entry align="center" valign="bottom">67</entry></row><row><entry valign="bottom">21</entry><entry align="center" valign="bottom">69.25</entry><entry align="center" valign="bottom">9.03</entry><entry align="center" valign="bottom">0.39</entry><entry align="center" valign="bottom">13.41</entry><entry align="center" valign="bottom">2.21</entry><entry align="center" valign="bottom">5.04</entry><entry align="center" valign="bottom">0.47</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1190</entry><entry align="center" valign="bottom">1186</entry><entry align="center" valign="bottom">39</entry></row><row><entry valign="bottom">22</entry><entry align="center" valign="bottom">69.41</entry><entry align="center" valign="bottom">8.55</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.05</entry><entry align="center" valign="bottom">1.19</entry><entry align="center" valign="bottom">6.17</entry><entry align="center" valign="bottom">0.44</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1199</entry><entry align="center" valign="bottom">43</entry></row><row><entry valign="bottom">23</entry><entry align="center" valign="bottom">65.19</entry><entry align="center" valign="bottom">10.19</entry><entry align="center" valign="bottom">6.2</entry><entry align="center" valign="bottom">12.06</entry><entry align="center" valign="bottom">2.68</entry><entry align="center" valign="bottom">1.81</entry><entry align="center" valign="bottom">0.78</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1205</entry><entry align="center" valign="bottom">137</entry></row><row><entry valign="bottom">24</entry><entry align="center" valign="bottom">70.92</entry><entry align="center" valign="bottom">8.52</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.7</entry><entry align="center" valign="bottom">1.17</entry><entry align="center" valign="bottom">5.11</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">>1245</entry><entry align="center" valign="bottom">1241</entry><entry align="center" valign="bottom">70</entry></row><row><entry valign="bottom">25</entry><entry align="center" valign="bottom">62.97</entry><entry align="center" valign="bottom">8.91</entry><entry align="center" valign="bottom">2.23</entry><entry align="center" valign="bottom">15.46</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">5.34</entry><entry align="center" valign="bottom">0.08</entry><entry align="center" valign="bottom">0.15</entry><entry align="center" valign="bottom"><1090</entry><entry align="center" valign="bottom">985</entry><entry align="center" valign="bottom">-20</entry></row><row><entry valign="bottom">26</entry><entry align="center" valign="bottom">64.88</entry><entry align="center" valign="bottom">9.18</entry><entry align="center" valign="bottom">2.29</entry><entry align="center" valign="bottom">14.43</entry><entry align="center" valign="bottom">3.49</entry><entry align="center" valign="bottom">5.49</entry><entry align="center" valign="bottom">0.07</entry><entry align="center" valign="bottom">0.15</entry><entry align="center" valign="bottom"><1100</entry><entry align="center" valign="bottom">1071</entry><entry align="center" valign="bottom">-3</entry></row><row><entry valign="bottom">27</entry><entry align="center" valign="bottom">64.87</entry><entry align="center" valign="bottom">9.18</entry><entry align="center" valign="bottom">0.8</entry><entry align="center" valign="bottom">14.42</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">5.5</entry><entry align="center" valign="bottom">0.07</entry><entry align="center" valign="bottom">0.15</entry><entry align="center" valign="bottom"><1100</entry><entry align="center" valign="bottom">1015</entry><entry align="center" valign="bottom">-49</entry></row><row><entry valign="bottom">28</entry><entry align="center" valign="bottom">72.16</entry><entry align="center" valign="bottom">8.13</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.27</entry><entry align="center" valign="bottom">1.03</entry><entry align="center" valign="bottom">4.81</entry><entry align="center" valign="bottom">0.42</entry><entry align="center" valign="bottom">0.16</entry><entry align="center" valign="bottom">>1245</entry><entry align="center" valign="bottom">1277</entry><entry align="center" valign="bottom">100</entry></row><row><entry valign="bottom">29</entry><entry align="center" valign="bottom">73.51</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.58</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1250</entry><entry align="center" valign="bottom">1299</entry><entry align="center" valign="bottom">124</entry></row><row><entry valign="bottom">30</entry><entry align="center" valign="bottom">73.14</entry><entry align="center" valign="bottom">7.19</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.54</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">4.72</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1250</entry><entry align="center" valign="bottom">1283</entry><entry align="center" valign="bottom">108</entry></row><row><entry valign="bottom">31</entry><entry align="center" valign="bottom">73.52</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.87</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.61</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1260</entry><entry align="center" valign="bottom">1328</entry><entry align="center" valign="bottom">163</entry></row><row><entry valign="bottom">32</entry><entry align="center" valign="bottom">65.7</entry><entry align="center" valign="bottom">8</entry><entry align="center" valign="bottom">10</entry><entry align="center" valign="bottom">15.7</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.08</entry><entry align="center" valign="bottom">>1260</entry><entry align="center" valign="bottom">1262</entry><entry align="center" valign="bottom">314</entry></row><row><entry valign="bottom">33</entry><entry align="center" valign="bottom">65.91</entry><entry align="center" valign="bottom">10.3</entry><entry align="center" valign="bottom">6.27</entry><entry align="center" valign="bottom">12.19</entry><entry align="center" valign="bottom">2.71</entry><entry align="center" valign="bottom">1.83</entry><entry align="center" valign="bottom">0.79</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1230</entry><entry align="center" valign="bottom">1195</entry><entry align="center" valign="bottom">132</entry></row></tbody></tgroup></table></tables><tables id="tabl0002" num="0002"><table frame="none"><title>Table 2. Results from isothermal zircon breakdown experiments.</title><tgroup cols="12" colsep="0" rowsep="0"><colspec colnum="1" colname="col1" colwidth="17mm" /><colspec colnum="2" colname="col2" colwidth="17mm" /><colspec colnum="3" colname="col3" colwidth="15mm" /><colspec colnum="4" colname="col4" colwidth="15mm" /><colspec colnum="5" colname="col5" colwidth="15mm" /><colspec colnum="6" colname="col6" colwidth="15mm" /><colspec colnum="7" colname="col7" colwidth="15mm" /><colspec colnum="8" colname="col8" colwidth="15mm" /><colspec colnum="9" colname="col9" colwidth="15mm" /><colspec colnum="10" colname="col10" colwidth="28mm" /><colspec colnum="11" colname="col11" colwidth="30mm" /><colspec colnum="12" colname="col12" colwidth="42mm" /><thead><row><entry>Sample</entry><entry align="center">SiO₂</entry><entry align="center">Al₂O₃</entry><entry align="center">B2O₃</entry><entry align="center">Na₂O</entry><entry align="center">K₂O</entry><entry align="center">MgO</entry><entry align="center">CaO</entry><entry align="center">SnO₂</entry><entry align="center">Zirconia amount</entry><entry align="center">Breakdown T (°C)</entry><entry align="center">Predicted breakdown T(°C)</entry></row></thead><tbody><row><entry valign="bottom">34</entry><entry align="center" valign="bottom">65</entry><entry align="center" valign="bottom">11.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">2.35</entry><entry align="center" valign="bottom">5.75</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1076</entry></row><row><entry valign="bottom">35</entry><entry align="center" valign="bottom">64</entry><entry align="center" valign="bottom">12.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">2.35</entry><entry align="center" valign="bottom">5.75</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1052</entry></row><row><entry valign="bottom">36</entry><entry align="center" valign="bottom">64</entry><entry align="center" valign="bottom">11.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">2.35</entry><entry align="center" valign="bottom">5.75</entry><entry align="center" valign="bottom">1.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1052</entry></row><row><entry valign="bottom">37</entry><entry align="center" valign="bottom">62</entry><entry align="center" valign="bottom">12.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">2.35</entry><entry align="center" valign="bottom">5.75</entry><entry align="center" valign="bottom">2.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1004</entry></row><row><entry valign="bottom">6</entry><entry align="center" valign="bottom">66</entry><entry align="center" valign="bottom">11.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">1.35</entry><entry align="center" valign="bottom">4.75</entry><entry align="center" valign="bottom">1.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1123</entry></row><row><entry valign="bottom">38</entry><entry align="center" valign="bottom">66</entry><entry align="center" valign="bottom">12.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">0.35</entry><entry align="center" valign="bottom">3.75</entry><entry align="center" valign="bottom">2.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1146</entry></row><row><entry valign="bottom">39</entry><entry align="center" valign="bottom">66</entry><entry align="center" valign="bottom">11.3</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.2</entry><entry align="center" valign="bottom">1.4</entry><entry align="center" valign="bottom">5.2</entry><entry align="center" valign="bottom">1.1</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1122</entry></row><row><entry valign="bottom">40</entry><entry align="center" valign="bottom">66</entry><entry align="center" valign="bottom">11.3</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.2</entry><entry align="center" valign="bottom">1.4</entry><entry align="center" valign="bottom">5.7</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1121</entry></row><row><entry valign="bottom">41</entry><entry align="center" valign="bottom">65.35</entry><entry align="center" valign="bottom">11.19</entry><entry align="center" valign="bottom">1.58</entry><entry align="center" valign="bottom">14.06</entry><entry align="center" valign="bottom">1.34</entry><entry align="center" valign="bottom">4.7</entry><entry align="center" valign="bottom">1.58</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1124</entry></row><row><entry valign="bottom">42</entry><entry align="center" valign="bottom">65.34</entry><entry align="center" valign="bottom">11.19</entry><entry align="center" valign="bottom">1.58</entry><entry align="center" valign="bottom">14.06</entry><entry align="center" valign="bottom">1.39</entry><entry align="center" valign="bottom">5.15</entry><entry align="center" valign="bottom">1.09</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1122</entry></row><row><entry valign="bottom">29</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.6</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1298</entry></row><row><entry valign="bottom">43</entry><entry align="center" valign="bottom">72.55</entry><entry align="center" valign="bottom">8.2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.8</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.35</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1273</entry></row><row><entry valign="bottom">44</entry><entry align="center" valign="bottom">71.6</entry><entry align="center" valign="bottom">8.85</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.45</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1248</entry></row><row><entry valign="bottom">45</entry><entry align="center" valign="bottom">70.7</entry><entry align="center" valign="bottom">9.45</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.2</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.55</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1225</entry></row><row><entry valign="bottom">46</entry><entry align="center" valign="bottom">69.75</entry><entry align="center" valign="bottom">10.05</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.4</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.7</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1200</entry></row><row><entry valign="bottom">47</entry><entry align="center" valign="bottom">69.87</entry><entry align="center" valign="bottom">8.77</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.67</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.14</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1209</entry></row><row><entry valign="bottom">48</entry><entry align="center" valign="bottom">71.04</entry><entry align="center" valign="bottom">8</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.42</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1240</entry></row><row><entry valign="bottom">49</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.17</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1270</entry></row><row><entry valign="bottom">50</entry><entry align="center" valign="bottom">5170.43</entry><entry align="center" valign="bottom">8.77</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.67</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.14</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1214</entry></row><row><entry valign="bottom">51</entry><entry align="center" valign="bottom">71.61</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.42</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1245</entry></row><row><entry valign="bottom">52</entry><entry align="center" valign="bottom">72.78</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.17</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1275</entry></row><row><entry valign="bottom">16</entry><entry align="center" valign="bottom">70.72</entry><entry align="center" valign="bottom">8.67</entry><entry align="center" valign="bottom" /><entry align="center" valign="bottom">13</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">5.19</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1220</entry></row><row><entry valign="bottom">53</entry><entry align="center" valign="bottom">71.61</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.95</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1239</entry></row><row><entry valign="bottom">30</entry><entry align="center" valign="bottom">73.14</entry><entry align="center" valign="bottom">7.19</entry><entry align="center" valign="bottom" /><entry align="center" valign="bottom">12.54</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">4.72</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1283</entry></row><row><entry valign="bottom">54</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.17</entry><entry align="center" valign="bottom">3.36</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1238</entry></row><row><entry valign="bottom">55</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.26</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">3.84</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1242</entry></row><row><entry valign="bottom">56</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.26</entry><entry align="center" valign="bottom">3.27</entry><entry align="center" valign="bottom">3.84</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1230</entry></row><row><entry valign="bottom">57</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.75</entry><entry align="center" valign="bottom">1.15</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1312</entry></row><row><entry valign="bottom">58</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.9</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1327</entry></row><row><entry valign="bottom">59</entry><entry align="center" valign="bottom">72.55</entry><entry align="center" valign="bottom">8.2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.95</entry><entry align="center" valign="bottom">1.15</entry><entry align="center" valign="bottom">4.35</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1288</entry></row><row><entry valign="bottom">60</entry><entry align="center" valign="bottom">72.55</entry><entry align="center" valign="bottom">8.2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.1</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.35</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1302</entry></row><row><entry valign="bottom">61</entry><entry align="center" valign="bottom">73.94</entry><entry align="center" valign="bottom">7.65</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.98</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.23</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1337</entry></row><row><entry valign="bottom">62</entry><entry align="center" valign="bottom">72.98</entry><entry align="center" valign="bottom">8.25</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.19</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.38</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1311</entry></row><row><entry valign="bottom">63</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.6</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1298</entry></row><row><entry valign="bottom">31</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.9</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1327</entry></row><row><entry valign="bottom">64</entry><entry align="center" valign="bottom">62.93</entry><entry align="center" valign="bottom">12.99</entry><entry align="center" valign="bottom">5</entry><entry align="center" valign="bottom">16.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1100</entry><entry align="center" valign="bottom">1077</entry></row><row><entry valign="bottom">65</entry><entry align="center" valign="bottom">61.94</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">15.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1078</entry></row><row><entry valign="bottom">66</entry><entry align="center" valign="bottom">61.93</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">4</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1053</entry></row><row><entry valign="bottom">67</entry><entry align="center" valign="bottom">61.93</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1096</entry></row><row><entry valign="bottom">68</entry><entry align="center" valign="bottom">61.93</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">5</entry><entry align="center" valign="bottom">16.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1053</entry></row><row><entry valign="bottom">69</entry><entry align="center" valign="bottom">61.93</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">4</entry><entry align="center" valign="bottom">17.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1028</entry></row><row><entry valign="bottom">8</entry><entry align="center" valign="bottom">67.87</entry><entry align="center" valign="bottom">9.21</entry><entry align="center" valign="bottom">0.54</entry><entry align="center" valign="bottom">14.16</entry><entry align="center" valign="bottom">2.34</entry><entry align="center" valign="bottom">5.22</entry><entry align="center" valign="bottom">0.46</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1170</entry><entry align="center" valign="bottom">1145</entry></row><row><entry valign="bottom">70</entry><entry align="center" valign="bottom">67.732</entry><entry align="center" valign="bottom">9.696</entry><entry align="center" valign="bottom">0.6185</entry><entry align="center" valign="bottom">13.336</entry><entry align="center" valign="bottom">2.3738</entry><entry align="center" valign="bottom">5.5414</entry><entry align="center" valign="bottom">0.4871</entry><entry align="center" valign="bottom">0.1855</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1170</entry><entry align="center" valign="bottom">1150</entry></row><row><entry valign="bottom">71</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">8.54</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">13.96</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1190</entry><entry align="center" valign="bottom">1167</entry></row><row><entry valign="bottom">72</entry><entry align="center" valign="bottom">71.15</entry><entry align="center" valign="bottom">7.78</entry><entry align="center" valign="bottom">0.51</entry><entry align="center" valign="bottom">12.93</entry><entry align="center" valign="bottom">2.09</entry><entry align="center" valign="bottom">4.87</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1240</entry></row><row><entry valign="bottom">73</entry><entry align="center" valign="bottom">71.16</entry><entry align="center" valign="bottom">8.03</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.18</entry><entry align="center" valign="bottom">2.09</entry><entry align="center" valign="bottom">4.87</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1230</entry></row><row><entry valign="bottom">74</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">12.99</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1236</entry></row><row><entry valign="bottom">75</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1241</entry></row><row><entry valign="bottom">76</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">12.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1246</entry></row><row><entry valign="bottom">77</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">14.49</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1225</entry></row><row><entry valign="bottom">78</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">12.49</entry><entry align="center" valign="bottom">9.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1256</entry></row><row><entry valign="bottom">79</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">11.49</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1216</entry></row><row><entry valign="bottom">80</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">14.49</entry><entry align="center" valign="bottom">6.99</entry><entry align="center" valign="bottom">14.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1200</entry></row><row><entry valign="bottom">81</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">12.49</entry><entry align="center" valign="bottom">10.99</entry><entry align="center" valign="bottom">12.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1281</entry></row><row><entry valign="bottom">82</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1302</entry></row><row><entry valign="bottom">83</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1225</entry></row><row><entry valign="bottom">84</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">6.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1208</entry></row><row><entry valign="bottom">85</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">9.68</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.37</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1165</entry></row><row><entry valign="bottom">86</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">9.54</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.51</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1200</entry><entry align="center" valign="bottom">1163</entry></row><row><entry valign="bottom">15</entry><entry align="center" valign="bottom">70.194</entry><entry align="center" valign="bottom">8.6009</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.283</entry><entry align="center" valign="bottom">1.1848</entry><entry align="center" valign="bottom">5.098</entry><entry align="center" valign="bottom">0.4377</entry><entry align="center" valign="bottom">0.1751</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1217</entry></row><row><entry valign="bottom">14</entry><entry align="center" valign="bottom">70.223</entry><entry align="center" valign="bottom">8.8623</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.422</entry><entry align="center" valign="bottom">1.6727</entry><entry align="center" valign="bottom">5.1828</entry><entry align="center" valign="bottom">0.4383</entry><entry align="center" valign="bottom">0.1716</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1215</entry></row><row><entry valign="bottom">87</entry><entry align="center" valign="bottom">71.27</entry><entry align="center" valign="bottom">8.24</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.9</entry><entry align="center" valign="bottom">2.08</entry><entry align="center" valign="bottom">4.85</entry><entry align="center" valign="bottom">0.48</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1236</entry></row><row><entry valign="bottom">88</entry><entry align="center" valign="bottom">67.2</entry><entry align="center" valign="bottom">12.31</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">20.29</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1117</entry></row><row><entry valign="bottom">89</entry><entry align="center" valign="bottom">67.01</entry><entry align="center" valign="bottom">12.35</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">20.08</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1120</entry></row><row><entry valign="bottom">90</entry><entry align="center" valign="bottom">66.82</entry><entry align="center" valign="bottom">12.38</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">19.88</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">High</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1123</entry></row><row><entry valign="bottom">91</entry><entry align="center" valign="bottom">68.32</entry><entry align="center" valign="bottom">11.82</entry><entry align="center" valign="bottom">0.69</entry><entry align="center" valign="bottom">18.97</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1167</entry></row><row><entry valign="bottom">92</entry><entry align="center" valign="bottom">67.77</entry><entry align="center" valign="bottom">10.84</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">20.83</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1131</entry></row><row><entry valign="bottom">93</entry><entry align="center" valign="bottom">67.57</entry><entry align="center" valign="bottom">10.88</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">20.63</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1134</entry></row><row><entry valign="bottom">94</entry><entry align="center" valign="bottom">67.2</entry><entry align="center" valign="bottom">11.31</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">19.29</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1125</entry></row><row><entry valign="bottom">95</entry><entry align="center" valign="bottom">67.02</entry><entry align="center" valign="bottom">11.34</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">19.08</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1129</entry></row><row><entry valign="bottom">96</entry><entry align="center" valign="bottom">66.82</entry><entry align="center" valign="bottom">11.38</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">18.88</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1131</entry></row><row><entry valign="bottom">97</entry><entry align="center" valign="bottom">68.7</entry><entry align="center" valign="bottom">10.74</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">18.36</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1170</entry></row><row><entry valign="bottom">98</entry><entry align="center" valign="bottom">68.52</entry><entry align="center" valign="bottom">10.78</entry><entry align="center" valign="bottom">0.34</entry><entry align="center" valign="bottom">18.16</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1173</entry></row><row><entry valign="bottom">99</entry><entry align="center" valign="bottom">68.31</entry><entry align="center" valign="bottom">10.82</entry><entry align="center" valign="bottom">0.69</entry><entry align="center" valign="bottom">17.98</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1175</entry></row><row><entry valign="bottom">100</entry><entry align="center" valign="bottom">66.14</entry><entry align="center" valign="bottom">10.19</entry><entry align="center" valign="bottom">0.58</entry><entry align="center" valign="bottom">14.16</entry><entry align="center" valign="bottom">2.37</entry><entry align="center" valign="bottom">5.75</entry><entry align="center" valign="bottom">0.59</entry><entry align="center" valign="bottom">0.21</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1103</entry></row><row><entry valign="bottom">101</entry><entry align="center" valign="bottom">66</entry><entry align="center" valign="bottom">12.3</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.2</entry><entry align="center" valign="bottom">0.35</entry><entry align="center" valign="bottom">4.75</entry><entry align="center" valign="bottom">1.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1145</entry></row><row><entry valign="bottom">102</entry><entry align="center" valign="bottom">61.88</entry><entry align="center" valign="bottom">13.97</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">17.96</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1100</entry><entry align="center" valign="bottom">1105</entry></row><row><entry valign="bottom">103</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">10.04</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.46</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1182</entry></row><row><entry valign="bottom">104</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">3</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1192</entry></row><row><entry valign="bottom">105</entry><entry align="center" valign="bottom">69.06</entry><entry align="center" valign="bottom">9.59</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.03</entry><entry align="center" valign="bottom">2.28</entry><entry align="center" valign="bottom">5.32</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1177</entry></row><row><entry valign="bottom">106</entry><entry align="center" valign="bottom">68.7</entry><entry align="center" valign="bottom">11.74</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">19.36</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1162</entry></row><row><entry valign="bottom">107</entry><entry align="center" valign="bottom">68.52</entry><entry align="center" valign="bottom">11.78</entry><entry align="center" valign="bottom">0.34</entry><entry align="center" valign="bottom">19.16</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1165</entry></row><row><entry valign="bottom">108</entry><entry align="center" valign="bottom">67.96</entry><entry align="center" valign="bottom">13.05</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">18.79</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1150</entry></row><row><entry valign="bottom">109</entry><entry align="center" valign="bottom">67.78</entry><entry align="center" valign="bottom">13.08</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">18.58</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Medium</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1153</entry></row><row><entry valign="bottom">110</entry><entry align="center" valign="bottom">67.58</entry><entry align="center" valign="bottom">13.12</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">18.38</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">Trace</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1156</entry></row><row><entry valign="bottom">111</entry><entry align="center" valign="bottom">69.57</entry><entry align="center" valign="bottom">8.43</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.95</entry><entry align="center" valign="bottom">1.16</entry><entry align="center" valign="bottom">6.18</entry><entry align="center" valign="bottom">0.5</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1206</entry></row><row><entry valign="bottom">112</entry><entry align="center" valign="bottom">69.9</entry><entry align="center" valign="bottom">8.3</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.81</entry><entry align="center" valign="bottom">1.15</entry><entry align="center" valign="bottom">6.14</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1215</entry></row><row><entry valign="bottom">113</entry><entry align="center" valign="bottom">69.4</entry><entry align="center" valign="bottom">8.36</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.29</entry><entry align="center" valign="bottom">1.06</entry><entry align="center" valign="bottom">6.18</entry><entry align="center" valign="bottom">0.5</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1201</entry></row><row><entry valign="bottom">114</entry><entry align="center" valign="bottom">69.95</entry><entry align="center" valign="bottom">8.23</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.01</entry><entry align="center" valign="bottom">1.04</entry><entry align="center" valign="bottom">6.07</entry><entry align="center" valign="bottom">0.5</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">None</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1217</entry></row></tbody></tgroup></table></tables><tables id="tabl0003" num="0003"><table frame="none"><title>Table 3. Glass compositions that satisfy equation (3).</title><tgroup cols="13" colsep="0" rowsep="0"><colspec colnum="1" colname="col1" colwidth="17mm" /><colspec colnum="2" colname="col2" colwidth="14mm" /><colspec colnum="3" colname="col3" colwidth="14mm" /><colspec colnum="4" colname="col4" colwidth="14mm" /><colspec colnum="5" colname="col5" colwidth="14mm" /><colspec colnum="6" colname="col6" colwidth="12mm" /><colspec colnum="7" colname="col7" colwidth="13mm" /><colspec colnum="8" colname="col8" colwidth="12mm" /><colspec colnum="9" colname="col9" colwidth="14mm" /><colspec colnum="10" colname="col10" colwidth="29mm" /><colspec colnum="11" colname="col11" colwidth="42mm" /><colspec colnum="12" colname="col12" colwidth="27mm" /><colspec colnum="13" colname="col13" colwidth="26mm" /><thead><row><entry>Sample</entry><entry align="center">SiO₂</entry><entry align="center">Al₂O₃</entry><entry align="center">B₂O₃</entry><entry align="center">Na₂O</entry><entry align="center">K₂O</entry><entry align="center">MgO</entry><entry align="center">CaO</entry><entry align="center">SnO₂</entry><entry align="center">Breakdown T(°C)</entry><entry align="center">Predicted breakdown T(°C)</entry><entry align="center">35kp prediction</entry><entry align="center">margin predict</entry></row></thead><tbody><row><entry valign="bottom">6</entry><entry align="center" valign="bottom">66.01</entry><entry align="center" valign="bottom">11.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.2</entry><entry align="center" valign="bottom">1.35</entry><entry align="center" valign="bottom">4.76</entry><entry align="center" valign="bottom">1.61</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">1120</entry><entry align="center" valign="bottom">1124</entry><entry align="center" valign="bottom">1113</entry><entry align="center" valign="bottom">11</entry></row><row><entry valign="bottom">38</entry><entry align="center" valign="bottom">66</entry><entry align="center" valign="bottom">12.25</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">14.25</entry><entry align="center" valign="bottom">0.35</entry><entry align="center" valign="bottom">3.75</entry><entry align="center" valign="bottom">2.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1146</entry><entry align="center" valign="bottom">1096</entry><entry align="center" valign="bottom">50</entry></row><row><entry valign="bottom">41</entry><entry align="center" valign="bottom">65.35</entry><entry align="center" valign="bottom">11.19</entry><entry align="center" valign="bottom">1.58</entry><entry align="center" valign="bottom">14.06</entry><entry align="center" valign="bottom">1.34</entry><entry align="center" valign="bottom">4.7</entry><entry align="center" valign="bottom">1.58</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1124</entry><entry align="center" valign="bottom">1100</entry><entry align="center" valign="bottom">24</entry></row><row><entry valign="bottom">29</entry><entry align="center" valign="bottom">73.51</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.58</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1250</entry><entry align="center" valign="bottom">1299</entry><entry align="center" valign="bottom">1175</entry><entry align="center" valign="bottom">124</entry></row><row><entry valign="bottom">43</entry><entry align="center" valign="bottom">72.55</entry><entry align="center" valign="bottom">8.2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.8</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.35</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1273</entry><entry align="center" valign="bottom">1178</entry><entry align="center" valign="bottom">95</entry></row><row><entry valign="bottom">44</entry><entry align="center" valign="bottom">71.6</entry><entry align="center" valign="bottom">8.85</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.45</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1248</entry><entry align="center" valign="bottom">1184</entry><entry align="center" valign="bottom">64</entry></row><row><entry valign="bottom">45</entry><entry align="center" valign="bottom">70.7</entry><entry align="center" valign="bottom">9.45</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.2</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.55</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1225</entry><entry align="center" valign="bottom">1188</entry><entry align="center" valign="bottom">37</entry></row><row><entry valign="bottom">46</entry><entry align="center" valign="bottom">69.75</entry><entry align="center" valign="bottom">10.05</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.4</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.7</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1200</entry><entry align="center" valign="bottom">1192</entry><entry align="center" valign="bottom">8</entry></row><row><entry valign="bottom">47</entry><entry align="center" valign="bottom">69.87</entry><entry align="center" valign="bottom">8.77</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.67</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.14</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1209</entry><entry align="center" valign="bottom">1157</entry><entry align="center" valign="bottom">52</entry></row><row><entry valign="bottom">48</entry><entry align="center" valign="bottom">71.04</entry><entry align="center" valign="bottom">8</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.42</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1240</entry><entry align="center" valign="bottom">1151</entry><entry align="center" valign="bottom">89</entry></row><row><entry valign="bottom">49</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.17</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1270</entry><entry align="center" valign="bottom">1145</entry><entry align="center" valign="bottom">125</entry></row><row><entry valign="bottom">50</entry><entry align="center" valign="bottom">70.43</entry><entry align="center" valign="bottom">8.77</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.67</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.14</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1214</entry><entry align="center" valign="bottom">1167</entry><entry align="center" valign="bottom">47</entry></row><row><entry valign="bottom">51</entry><entry align="center" valign="bottom">71.61</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.42</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1245</entry><entry align="center" valign="bottom">1162</entry><entry align="center" valign="bottom">83</entry></row><row><entry valign="bottom">52</entry><entry align="center" valign="bottom">72.78</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.17</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1275</entry><entry align="center" valign="bottom">1156</entry><entry align="center" valign="bottom">119</entry></row><row><entry valign="bottom">16</entry><entry align="center" valign="bottom">70.72</entry><entry align="center" valign="bottom">8.67</entry><entry align="center" valign="bottom" /><entry align="center" valign="bottom">13</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">5.19</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">1187</entry><entry align="center" valign="bottom">33</entry></row><row><entry valign="bottom">16</entry><entry align="center" valign="bottom">70.72</entry><entry align="center" valign="bottom">8.67</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">5.19</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">1187</entry><entry align="center" valign="bottom">33</entry></row><row><entry valign="bottom">53</entry><entry align="center" valign="bottom">71.61</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.95</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">4.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1239</entry><entry align="center" valign="bottom">1176</entry><entry align="center" valign="bottom">63</entry></row><row><entry valign="bottom">30</entry><entry align="center" valign="bottom">73.14</entry><entry align="center" valign="bottom">7.19</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.54</entry><entry align="center" valign="bottom">2.16</entry><entry align="center" valign="bottom">4.72</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1250</entry><entry align="center" valign="bottom">1283</entry><entry align="center" valign="bottom">1175</entry><entry align="center" valign="bottom">108</entry></row><row><entry valign="bottom">54</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.17</entry><entry align="center" valign="bottom">3.36</entry><entry align="center" valign="bottom">4.84</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1238</entry><entry align="center" valign="bottom">1158</entry><entry align="center" valign="bottom">80</entry></row><row><entry valign="bottom">55</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.26</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">3.84</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1242</entry><entry align="center" valign="bottom">1123</entry><entry align="center" valign="bottom">119</entry></row><row><entry valign="bottom">56</entry><entry align="center" valign="bottom">72.22</entry><entry align="center" valign="bottom">7.22</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.26</entry><entry align="center" valign="bottom">3.27</entry><entry align="center" valign="bottom">3.84</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1230</entry><entry align="center" valign="bottom">1127</entry><entry align="center" valign="bottom">103</entry></row><row><entry valign="bottom">57</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.75</entry><entry align="center" valign="bottom">1.15</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1312</entry><entry align="center" valign="bottom">1169</entry><entry align="center" valign="bottom">143</entry></row><row><entry valign="bottom">58</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.9</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1327</entry><entry align="center" valign="bottom">1164</entry><entry align="center" valign="bottom">163</entry></row><row><entry valign="bottom">59</entry><entry align="center" valign="bottom">72.55</entry><entry align="center" valign="bottom">8.2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.95</entry><entry align="center" valign="bottom">1.15</entry><entry align="center" valign="bottom">4.35</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1288</entry><entry align="center" valign="bottom">1174</entry><entry align="center" valign="bottom">114</entry></row><row><entry valign="bottom">60</entry><entry align="center" valign="bottom">72.55</entry><entry align="center" valign="bottom">8.2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.1</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.35</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1302</entry><entry align="center" valign="bottom">1169</entry><entry align="center" valign="bottom">133</entry></row><row><entry valign="bottom">61</entry><entry align="center" valign="bottom">73.94</entry><entry align="center" valign="bottom">7.65</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.98</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.23</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1337</entry><entry align="center" valign="bottom">1198</entry><entry align="center" valign="bottom">139</entry></row><row><entry valign="bottom">62</entry><entry align="center" valign="bottom">72.98</entry><entry align="center" valign="bottom">8.25</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.19</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.38</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1311</entry><entry align="center" valign="bottom">1202</entry><entry align="center" valign="bottom">109</entry></row><row><entry valign="bottom">63</entry><entry align="center" valign="bottom">73.5</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">11.6</entry><entry align="center" valign="bottom">2.3</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1298</entry><entry align="center" valign="bottom">1174</entry><entry align="center" valign="bottom">124</entry></row><row><entry valign="bottom">31</entry><entry align="center" valign="bottom">73.52</entry><entry align="center" valign="bottom">7.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.87</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">4.2</entry><entry align="center" valign="bottom">0.61</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1260</entry><entry align="center" valign="bottom">1328</entry><entry align="center" valign="bottom">1165</entry><entry align="center" valign="bottom">163</entry></row><row><entry valign="bottom">102</entry><entry align="center" valign="bottom">61.88</entry><entry align="center" valign="bottom">13.97</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">17.96</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1100</entry><entry align="center" valign="bottom">1105</entry><entry align="center" valign="bottom">1072</entry><entry align="center" valign="bottom">33</entry></row><row><entry valign="bottom">2</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">15.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1115</entry><entry align="center" valign="bottom">1126</entry><entry align="center" valign="bottom">1046</entry><entry align="center" valign="bottom">80</entry></row><row><entry valign="bottom">4</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">5.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1150</entry><entry align="center" valign="bottom">1144</entry><entry align="center" valign="bottom">1107</entry><entry align="center" valign="bottom">37</entry></row><row><entry valign="bottom">64</entry><entry align="center" valign="bottom">62.93</entry><entry align="center" valign="bottom">12.99</entry><entry align="center" valign="bottom">5</entry><entry align="center" valign="bottom">16.98</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom"><1100</entry><entry align="center" valign="bottom">1077</entry><entry align="center" valign="bottom">1051</entry><entry align="center" valign="bottom">26</entry></row><row><entry valign="bottom">10</entry><entry align="center" valign="bottom">68.07</entry><entry align="center" valign="bottom">9.72</entry><entry align="center" valign="bottom">0.57</entry><entry align="center" valign="bottom">13.21</entry><entry align="center" valign="bottom">2.31</entry><entry align="center" valign="bottom">5.39</entry><entry align="center" valign="bottom">0.54</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1160</entry><entry align="center" valign="bottom">1160</entry><entry align="center" valign="bottom">1155</entry><entry align="center" valign="bottom">5</entry></row><row><entry valign="bottom">11</entry><entry align="center" valign="bottom">68.68</entry><entry align="center" valign="bottom">9.54</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">12.92</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1180</entry><entry align="center" valign="bottom">1178</entry><entry align="center" valign="bottom">1163</entry><entry align="center" valign="bottom">15</entry></row><row><entry valign="bottom">8</entry><entry align="center" valign="bottom">67.85</entry><entry align="center" valign="bottom">9.21</entry><entry align="center" valign="bottom">0.54</entry><entry align="center" valign="bottom">14.16</entry><entry align="center" valign="bottom">2.34</entry><entry align="center" valign="bottom">5.22</entry><entry align="center" valign="bottom">0.46</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">1140</entry><entry align="center" valign="bottom">1145</entry><entry align="center" valign="bottom">1122</entry><entry align="center" valign="bottom">23</entry></row><row><entry valign="bottom">71</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">8.54</entry><entry align="center" valign="bottom">0.56</entry><entry align="center" valign="bottom">13.96</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom"><1190</entry><entry align="center" valign="bottom">1167</entry><entry align="center" valign="bottom">1114</entry><entry align="center" valign="bottom">53</entry></row><row><entry valign="bottom">72</entry><entry align="center" valign="bottom">71.15</entry><entry align="center" valign="bottom">7.78</entry><entry align="center" valign="bottom">0.51</entry><entry align="center" valign="bottom">12.93</entry><entry align="center" valign="bottom">2.09</entry><entry align="center" valign="bottom">4.87</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1240</entry><entry align="center" valign="bottom">1140</entry><entry align="center" valign="bottom">100</entry></row><row><entry valign="bottom">73</entry><entry align="center" valign="bottom">71.16</entry><entry align="center" valign="bottom">8.03</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.18</entry><entry align="center" valign="bottom">2.09</entry><entry align="center" valign="bottom">4.87</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1230</entry><entry align="center" valign="bottom">1146</entry><entry align="center" valign="bottom">84</entry></row><row><entry valign="bottom">74</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">12.99</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1236</entry><entry align="center" valign="bottom">1119</entry><entry align="center" valign="bottom">117</entry></row><row><entry valign="bottom">75</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1241</entry><entry align="center" valign="bottom">1143</entry><entry align="center" valign="bottom">98</entry></row><row><entry valign="bottom">76</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.99</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">12.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1246</entry><entry align="center" valign="bottom">1166</entry><entry align="center" valign="bottom">80</entry></row><row><entry valign="bottom">77</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">14.49</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1225</entry><entry align="center" valign="bottom">1178</entry><entry align="center" valign="bottom">47</entry></row><row><entry valign="bottom">78</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">12.49</entry><entry align="center" valign="bottom">9.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1256</entry><entry align="center" valign="bottom">1107</entry><entry align="center" valign="bottom">149</entry></row><row><entry valign="bottom">79</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">8.99</entry><entry align="center" valign="bottom">11.49</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1216</entry><entry align="center" valign="bottom">1151</entry><entry align="center" valign="bottom">65</entry></row><row><entry valign="bottom">80</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">14.49</entry><entry align="center" valign="bottom">6.99</entry><entry align="center" valign="bottom">14.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1200</entry><entry align="center" valign="bottom">1167</entry><entry align="center" valign="bottom">33</entry></row><row><entry valign="bottom">81</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">12.49</entry><entry align="center" valign="bottom">10.99</entry><entry align="center" valign="bottom">12.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1281</entry><entry align="center" valign="bottom">1119</entry><entry align="center" valign="bottom">162</entry></row><row><entry valign="bottom">82</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">11.99</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1302</entry><entry align="center" valign="bottom">1107</entry><entry align="center" valign="bottom">195</entry></row><row><entry valign="bottom">83</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">7.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1225</entry><entry align="center" valign="bottom">1162</entry><entry align="center" valign="bottom">63</entry></row><row><entry valign="bottom">84</entry><entry align="center" valign="bottom">63.94</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">6.99</entry><entry align="center" valign="bottom">13.49</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1208</entry><entry align="center" valign="bottom">1181</entry><entry align="center" valign="bottom">27</entry></row><row><entry valign="bottom">85</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">9.68</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.37</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1170</entry><entry align="center" valign="bottom">1165</entry><entry align="center" valign="bottom">1162</entry><entry align="center" valign="bottom">3</entry></row><row><entry valign="bottom">105</entry><entry align="center" valign="bottom">69.06</entry><entry align="center" valign="bottom">9.59</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.03</entry><entry align="center" valign="bottom">2.28</entry><entry align="center" valign="bottom">5.32</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1190</entry><entry align="center" valign="bottom">1177</entry><entry align="center" valign="bottom">1170</entry><entry align="center" valign="bottom">7</entry></row><row><entry valign="bottom">32</entry><entry align="center" valign="bottom">65.7</entry><entry align="center" valign="bottom">8</entry><entry align="center" valign="bottom">10</entry><entry align="center" valign="bottom">15.7</entry><entry align="center" valign="bottom">0.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.08</entry><entry align="center" valign="bottom">>1260</entry><entry align="center" valign="bottom">1262</entry><entry align="center" valign="bottom">948</entry><entry align="center" valign="bottom">314</entry></row><row><entry valign="bottom">86</entry><entry align="center" valign="bottom">68.67</entry><entry align="center" valign="bottom">9.54</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.51</entry><entry align="center" valign="bottom">2.27</entry><entry align="center" valign="bottom">5.29</entry><entry align="center" valign="bottom">0.53</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom"><1200</entry><entry align="center" valign="bottom">1163</entry><entry align="center" valign="bottom">1155</entry><entry align="center" valign="bottom">8</entry></row><row><entry valign="bottom">15</entry><entry align="center" valign="bottom">70.19</entry><entry align="center" valign="bottom">8.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.28</entry><entry align="center" valign="bottom">1.19</entry><entry align="center" valign="bottom">5.1</entry><entry align="center" valign="bottom">0.44</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1217</entry><entry align="center" valign="bottom">1149</entry><entry align="center" valign="bottom">68</entry></row><row><entry valign="bottom">14</entry><entry align="center" valign="bottom">70.25</entry><entry align="center" valign="bottom">8.86</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.43</entry><entry align="center" valign="bottom">1.67</entry><entry align="center" valign="bottom">5.18</entry><entry align="center" valign="bottom">0.41</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">1210</entry><entry align="center" valign="bottom">1216</entry><entry align="center" valign="bottom">1169</entry><entry align="center" valign="bottom">47</entry></row><row><entry valign="bottom">87</entry><entry align="center" valign="bottom">71.27</entry><entry align="center" valign="bottom">8.24</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">12.9</entry><entry align="center" valign="bottom">2.08</entry><entry align="center" valign="bottom">4.85</entry><entry align="center" valign="bottom">0.48</entry><entry align="center" valign="bottom">0.17</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1236</entry><entry align="center" valign="bottom">1159</entry><entry align="center" valign="bottom">77</entry></row><row><entry valign="bottom">28</entry><entry align="center" valign="bottom">72.16</entry><entry align="center" valign="bottom">8.13</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.27</entry><entry align="center" valign="bottom">1.03</entry><entry align="center" valign="bottom">4.81</entry><entry align="center" valign="bottom">0.42</entry><entry align="center" valign="bottom">0.16</entry><entry align="center" valign="bottom">>1245</entry><entry align="center" valign="bottom">1277</entry><entry align="center" valign="bottom">1177</entry><entry align="center" valign="bottom">100</entry></row><row><entry valign="bottom">22</entry><entry align="center" valign="bottom">69.41</entry><entry align="center" valign="bottom">8.55</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.05</entry><entry align="center" valign="bottom">1.19</entry><entry align="center" valign="bottom">6.17</entry><entry align="center" valign="bottom">0.44</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1199</entry><entry align="center" valign="bottom">1156</entry><entry align="center" valign="bottom">43</entry></row><row><entry valign="bottom">24</entry><entry align="center" valign="bottom">70.92</entry><entry align="center" valign="bottom">8.52</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.7</entry><entry align="center" valign="bottom">1.17</entry><entry align="center" valign="bottom">5.11</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">>1260</entry><entry align="center" valign="bottom">1241</entry><entry align="center" valign="bottom">1171</entry><entry align="center" valign="bottom">70</entry></row><row><entry valign="bottom">20</entry><entry align="center" valign="bottom">70.11</entry><entry align="center" valign="bottom">8.68</entry><entry align="center" valign="bottom">0.03</entry><entry align="center" valign="bottom">14.22</entry><entry align="center" valign="bottom">1.2</entry><entry align="center" valign="bottom">5.06</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1216</entry><entry align="center" valign="bottom">1149</entry><entry align="center" valign="bottom">67</entry></row><row><entry valign="bottom">23</entry><entry align="center" valign="bottom">65.19</entry><entry align="center" valign="bottom">10.19</entry><entry align="center" valign="bottom">6.2</entry><entry align="center" valign="bottom">12.06</entry><entry align="center" valign="bottom">2.68</entry><entry align="center" valign="bottom">1.81</entry><entry align="center" valign="bottom">0.78</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1205</entry><entry align="center" valign="bottom">1068</entry><entry align="center" valign="bottom">137</entry></row><row><entry valign="bottom">12</entry><entry align="center" valign="bottom">69.25</entry><entry align="center" valign="bottom">9.03</entry><entry align="center" valign="bottom">0.39</entry><entry align="center" valign="bottom">13.41</entry><entry align="center" valign="bottom">2.21</entry><entry align="center" valign="bottom">5.04</entry><entry align="center" valign="bottom">0.47</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1185</entry><entry align="center" valign="bottom">1186</entry><entry align="center" valign="bottom">1147</entry><entry align="center" valign="bottom">39</entry></row><row><entry valign="bottom">17</entry><entry align="center" valign="bottom">69.96</entry><entry align="center" valign="bottom">8.60</entry><entry align="center" valign="bottom">0.55</entry><entry align="center" valign="bottom">14.03</entry><entry align="center" valign="bottom">1.21</entry><entry align="center" valign="bottom">4.97</entry><entry align="center" valign="bottom">0.45</entry><entry align="center" valign="bottom">0.20</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1222</entry><entry align="center" valign="bottom">1145</entry><entry align="center" valign="bottom">77</entry></row><row><entry valign="bottom">18</entry><entry align="center" valign="bottom">69.85</entry><entry align="center" valign="bottom">8.71</entry><entry align="center" valign="bottom">0.05</entry><entry align="center" valign="bottom">14.27</entry><entry align="center" valign="bottom">1.26</entry><entry align="center" valign="bottom">5.18</entry><entry align="center" valign="bottom">0.47</entry><entry align="center" valign="bottom">0.19</entry><entry align="center" valign="bottom">1200</entry><entry align="center" valign="bottom">1208</entry><entry align="center" valign="bottom">1147</entry><entry align="center" valign="bottom">61</entry></row><row><entry valign="bottom">19</entry><entry align="center" valign="bottom">69.86</entry><entry align="center" valign="bottom">8.65</entry><entry align="center" valign="bottom">0.03</entry><entry align="center" valign="bottom">14.17</entry><entry align="center" valign="bottom">1.2</entry><entry align="center" valign="bottom">5.05</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">1220</entry><entry align="center" valign="bottom">1219</entry><entry align="center" valign="bottom">1150</entry><entry align="center" valign="bottom">69</entry></row><row><entry valign="bottom">33</entry><entry align="center" valign="bottom">65.91</entry><entry align="center" valign="bottom">10.3</entry><entry align="center" valign="bottom">6.27</entry><entry align="center" valign="bottom">12.19</entry><entry align="center" valign="bottom">2.71</entry><entry align="center" valign="bottom">1.83</entry><entry align="center" valign="bottom">0.79</entry><entry align="center" valign="bottom">0.1</entry><entry align="center" valign="bottom">1230</entry><entry align="center" valign="bottom">1195</entry><entry align="center" valign="bottom">1063</entry><entry align="center" valign="bottom">132</entry></row><row><entry valign="bottom">13</entry><entry align="center" valign="bottom">62.26</entry><entry align="center" valign="bottom">13.27</entry><entry align="center" valign="bottom">9.6</entry><entry align="center" valign="bottom">14.87</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1195</entry><entry align="center" valign="bottom">1195</entry><entry align="center" valign="bottom">1086</entry><entry align="center" valign="bottom">109</entry></row><row><entry valign="bottom">9</entry><entry align="center" valign="bottom">64.8</entry><entry align="center" valign="bottom">12.8</entry><entry align="center" valign="bottom">4.8</entry><entry align="center" valign="bottom">17.6</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1150</entry><entry align="center" valign="bottom">1155</entry><entry align="center" valign="bottom">1085</entry><entry align="center" valign="bottom">70</entry></row><row><entry valign="bottom">7</entry><entry align="center" valign="bottom">67.34</entry><entry align="center" valign="bottom">12.33</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">20.33</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">1125</entry><entry align="center" valign="bottom">1115</entry><entry align="center" valign="bottom">1083</entry><entry align="center" valign="bottom">32</entry></row><row><entry valign="bottom">88</entry><entry align="center" valign="bottom">67.2</entry><entry align="center" valign="bottom">12.31</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">20.29</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1117</entry><entry align="center" valign="bottom">1084</entry><entry align="center" valign="bottom">33</entry></row><row><entry valign="bottom">89</entry><entry align="center" valign="bottom">67.01</entry><entry align="center" valign="bottom">12.35</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">20.08</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1120</entry><entry align="center" valign="bottom">1084</entry><entry align="center" valign="bottom">36</entry></row><row><entry valign="bottom">90</entry><entry align="center" valign="bottom">66.82</entry><entry align="center" valign="bottom">12.38</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">19.88</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1123</entry><entry align="center" valign="bottom">1084</entry><entry align="center" valign="bottom">39</entry></row><row><entry valign="bottom">106</entry><entry align="center" valign="bottom">68.7</entry><entry align="center" valign="bottom">11.74</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">19.36</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1162</entry><entry align="center" valign="bottom">1102</entry><entry align="center" valign="bottom">60</entry></row><row><entry valign="bottom">107</entry><entry align="center" valign="bottom">68.52</entry><entry align="center" valign="bottom">11.78</entry><entry align="center" valign="bottom">0.34</entry><entry align="center" valign="bottom">19.16</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1165</entry><entry align="center" valign="bottom">1102</entry><entry align="center" valign="bottom">63</entry></row><row><entry valign="bottom">91</entry><entry align="center" valign="bottom">68.32</entry><entry align="center" valign="bottom">11.82</entry><entry align="center" valign="bottom">0.69</entry><entry align="center" valign="bottom">18.97</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1167</entry><entry align="center" valign="bottom">1102</entry><entry align="center" valign="bottom">65</entry></row><row><entry valign="bottom">108</entry><entry align="center" valign="bottom">67.96</entry><entry align="center" valign="bottom">13.05</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">18.79</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1150</entry><entry align="center" valign="bottom">1141</entry><entry align="center" valign="bottom">9</entry></row><row><entry valign="bottom">109</entry><entry align="center" valign="bottom">67.78</entry><entry align="center" valign="bottom">13.08</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">18.58</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1153</entry><entry align="center" valign="bottom">1142</entry><entry align="center" valign="bottom">11</entry></row><row><entry valign="bottom">110</entry><entry align="center" valign="bottom">67.58</entry><entry align="center" valign="bottom">13.12</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">18.38</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1156</entry><entry align="center" valign="bottom">1142</entry><entry align="center" valign="bottom">14</entry></row><row><entry valign="bottom">92</entry><entry align="center" valign="bottom">67.77</entry><entry align="center" valign="bottom">10.84</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">20.83</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1131</entry><entry align="center" valign="bottom">1036</entry><entry align="center" valign="bottom">95</entry></row><row><entry valign="bottom">93</entry><entry align="center" valign="bottom">67.57</entry><entry align="center" valign="bottom">10.88</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">20.63</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1134</entry><entry align="center" valign="bottom">1036</entry><entry align="center" valign="bottom">98</entry></row><row><entry valign="bottom">94</entry><entry align="center" valign="bottom">67.2</entry><entry align="center" valign="bottom">11.31</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">19.29</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1125</entry><entry align="center" valign="bottom">1098</entry><entry align="center" valign="bottom">27</entry></row><row><entry valign="bottom">95</entry><entry align="center" valign="bottom">67.02</entry><entry align="center" valign="bottom">11.34</entry><entry align="center" valign="bottom">0.36</entry><entry align="center" valign="bottom">19.08</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1129</entry><entry align="center" valign="bottom">1099</entry><entry align="center" valign="bottom">30</entry></row><row><entry valign="bottom">96</entry><entry align="center" valign="bottom">66.82</entry><entry align="center" valign="bottom">11.38</entry><entry align="center" valign="bottom">0.72</entry><entry align="center" valign="bottom">18.88</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom"><1150</entry><entry align="center" valign="bottom">1131</entry><entry align="center" valign="bottom">1099</entry><entry align="center" valign="bottom">32</entry></row><row><entry valign="bottom">97</entry><entry align="center" valign="bottom">68.7</entry><entry align="center" valign="bottom">10.74</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">18.36</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1170</entry><entry align="center" valign="bottom">1117</entry><entry align="center" valign="bottom">53</entry></row><row><entry valign="bottom">98</entry><entry align="center" valign="bottom">68.52</entry><entry align="center" valign="bottom">10.78</entry><entry align="center" valign="bottom">0.34</entry><entry align="center" valign="bottom">18.16</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1173</entry><entry align="center" valign="bottom">1117</entry><entry align="center" valign="bottom">56</entry></row><row><entry valign="bottom">99</entry><entry align="center" valign="bottom">68.31</entry><entry align="center" valign="bottom">10.82</entry><entry align="center" valign="bottom">0.69</entry><entry align="center" valign="bottom">17.98</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">2</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">0.2</entry><entry align="center" valign="bottom">>1150</entry><entry align="center" valign="bottom">1175</entry><entry align="center" valign="bottom">1117</entry><entry align="center" valign="bottom">58</entry></row><row><entry valign="bottom">111</entry><entry align="center" valign="bottom">69.57</entry><entry align="center" valign="bottom">8.43</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.95</entry><entry align="center" valign="bottom">1.16</entry><entry align="center" valign="bottom">6.18</entry><entry align="center" valign="bottom">0.5</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1206</entry><entry align="center" valign="bottom">1155</entry><entry align="center" valign="bottom">52</entry></row><row><entry valign="bottom">112</entry><entry align="center" valign="bottom">69.9</entry><entry align="center" valign="bottom">8.3</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">13.81</entry><entry align="center" valign="bottom">1.15</entry><entry align="center" valign="bottom">6.14</entry><entry align="center" valign="bottom">0.49</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1215</entry><entry align="center" valign="bottom">1158</entry><entry align="center" valign="bottom">58</entry></row><row><entry valign="bottom">113</entry><entry align="center" valign="bottom">69.4</entry><entry align="center" valign="bottom">8.36</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.29</entry><entry align="center" valign="bottom">1.06</entry><entry align="center" valign="bottom">6.18</entry><entry align="center" valign="bottom">0.5</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1201</entry><entry align="center" valign="bottom">1146</entry><entry align="center" valign="bottom">55</entry></row><row><entry valign="bottom">114</entry><entry align="center" valign="bottom">69.95</entry><entry align="center" valign="bottom">8.23</entry><entry align="center" valign="bottom">0</entry><entry align="center" valign="bottom">14.01</entry><entry align="center" valign="bottom">1.04</entry><entry align="center" valign="bottom">6.07</entry><entry align="center" valign="bottom">0.5</entry><entry align="center" valign="bottom">0.18</entry><entry align="center" valign="bottom">>1200</entry><entry align="center" valign="bottom">1217</entry><entry align="center" valign="bottom">1153</entry><entry align="center" valign="bottom">65</entry></row></tbody></tgroup></table></tables>