| 2011-02-14 | 31.98 | 31.77 | 4134400 |
| 2011-02-11 | 32.00 | 32.00 | 9252800 |
| 2011-02-10 | 31.97 | 32.06 | 4245900 |
| 2011-02-09 | 31.96 | 32.00 | 4290200 |
| 2011-02-08 | 32.04 | 32.00 | 3741200 |
| 2011-02-07 | 31.79 | 32.01 | 3722200 |
| 2011-02-04 | 31.96 | 31.80 | 4927200 |
| 2011-02-03 | 31.84 | 32.00 | 7417800 |
| 2011-02-02 | 31.95 | 31.87 | 3145000 |
| 2011-02-01 | 31.89 | 32.04 | 5293900 |
| 2011-01-31 | 31.80 | 31.72 | 4012900 |
| 2011-01-28 | 32.10 | 31.65 | 5662400 |
| 2011-01-27 | 31.87 | 32.08 | 3504400 |
| 2011-01-26 | 32.12 | 31.96 | 5554600 |
| 2011-01-25 | 32.07 | 32.08 | 8516900 |
| 2011-01-24 | 32.02 | 32.13 | 3661000 |
| 2011-01-21 | 32.18 | 31.95 | 7605000 |
| 2011-01-20 | 31.78 | 31.98 | 8609300 |
| 2011-01-19 | 31.84 | 31.74 | 4821900 |
| 2011-01-18 | 31.74 | 31.82 | 3594700 |
| 2011-01-14 | 31.55 | 31.74 | 5501100 |
| 2011-01-13 | 31.64 | 31.59 | 6799800 |
| 2011-01-12 | 31.54 | 31.62 | 4189600 |
| 2011-01-11 | 31.53 | 31.46 | 3186700 |
| 2011-01-10 | 31.50 | 31.41 | 6355600 |
| 2011-01-07 | 31.52 | 31.58 | 5092000 |
| 2011-01-06 | 31.47 | 31.47 | 5707100 |
| 2011-01-05 | 31.54 | 31.44 | 4595600 |
| 2011-01-04 | 31.49 | 31.64 | 4981500 |
| 2011-01-03 | 31.47 | 31.49 | 3536400 |
| 2010-12-31 | 31.33 | 31.34 | 2171300 |
| 2010-12-30 | 31.34 | 31.33 | 2475700 |