| 2011-02-14 | 21.78 | 21.75 | 6600 |
| 2011-02-11 | 21.56 | 21.71 | 5200 |
| 2011-02-10 | 21.52 | 21.55 | 5600 |
| 2011-02-09 | 21.72 | 21.86 | 4100 |
| 2011-02-08 | 21.74 | 21.50 | 3700 |
| 2011-02-07 | 21.44 | 21.73 | 2000 |
| 2011-02-04 | 21.72 | 21.72 | 800 |
| 2011-02-03 | 21.96 | 21.89 | 2800 |
| 2011-02-02 | 21.61 | 21.96 | 2200 |
| 2011-02-01 | 21.37 | 21.69 | 3800 |
| 2011-01-31 | 21.49 | 21.40 | 3800 |
| 2011-01-28 | 21.40 | 21.36 | 8000 |
| 2011-01-27 | 21.71 | 21.40 | 13900 |
| 2011-01-26 | 22.20 | 22.39 | 2700 |
| 2011-01-25 | 22.04 | 22.22 | 1800 |
| 2011-01-24 | 22.31 | 22.24 | 4100 |
| 2011-01-21 | 22.17 | 22.26 | 5300 |
| 2011-01-20 | 22.26 | 22.23 | 1500 |
| 2011-01-19 | 22.25 | 22.21 | 1000 |
| 2011-01-18 | 22.20 | 22.20 | 600 |
| 2011-01-14 | 22.23 | 22.18 | 1400 |
| 2011-01-13 | 22.02 | 22.23 | 2200 |
| 2011-01-12 | 22.48 | 22.48 | 100 |
| 2011-01-11 | 22.25 | 22.28 | 1600 |
| 2011-01-10 | 22.25 | 22.25 | 100 |
| 2011-01-07 | 22.27 | 22.27 | 100 |
| 2011-01-06 | 22.68 | 22.40 | 2200 |
| 2011-01-05 | 22.55 | 22.38 | 4500 |
| 2011-01-04 | 22.42 | 22.30 | 1000 |
| 2011-01-03 | 22.69 | 22.70 | 500 |
| 2010-12-31 | 22.21 | 22.21 | 300 |
| 2010-12-30 | 22.27 | 22.51 | 800 |
|
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