| 2011-02-14 | 18.99 | 18.86 | 133500 |
| 2011-02-11 | 19.27 | 18.95 | 230800 |
| 2011-02-10 | 19.44 | 19.21 | 418300 |
| 2011-02-09 | 18.79 | 18.82 | 215800 |
| 2011-02-08 | 18.85 | 18.69 | 152500 |
| 2011-02-07 | 19.13 | 18.96 | 291400 |
| 2011-02-04 | 19.71 | 19.28 | 304800 |
| 2011-02-03 | 19.95 | 19.71 | 225700 |
| 2011-02-02 | 20.02 | 19.81 | 206600 |
| 2011-02-01 | 20.64 | 19.93 | 500900 |
| 2011-01-31 | 21.37 | 21.09 | 606300 |
| 2011-01-28 | 20.07 | 21.37 | 812800 |
| 2011-01-27 | 20.32 | 20.07 | 406900 |
| 2011-01-26 | 20.73 | 20.45 | 347400 |
| 2011-01-25 | 21.30 | 20.82 | 376400 |
| 2011-01-24 | 21.98 | 21.05 | 333500 |
| 2011-01-21 | 21.18 | 22.05 | 271600 |
| 2011-01-20 | 21.50 | 21.58 | 542800 |
| 2011-01-19 | 20.47 | 21.06 | 328400 |
| 2011-01-18 | 21.25 | 20.60 | 227100 |
| 2011-01-14 | 21.27 | 20.77 | 239100 |
| 2011-01-13 | 21.34 | 21.35 | 259500 |
| 2011-01-12 | 21.60 | 21.32 | 300900 |
| 2011-01-11 | 21.75 | 21.86 | 258300 |
| 2011-01-10 | 22.41 | 21.98 | 140900 |
| 2011-01-07 | 21.97 | 22.14 | 229600 |
| 2011-01-06 | 22.52 | 22.00 | 237500 |
| 2011-01-05 | 23.14 | 22.66 | 145600 |
| 2011-01-04 | 22.93 | 22.97 | 304900 |
| 2011-01-03 | 23.44 | 23.17 | 303500 |
| 2010-12-31 | 23.86 | 23.91 | 163200 |
| 2010-12-30 | 23.79 | 23.76 | 122300 |
|
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