| 2011-02-14 | 22.91 | 22.89 | 90600 |
| 2011-02-11 | 22.22 | 22.87 | 118500 |
| 2011-02-10 | 22.24 | 22.30 | 132200 |
| 2011-02-09 | 22.50 | 22.41 | 105300 |
| 2011-02-08 | 22.54 | 22.67 | 90900 |
| 2011-02-07 | 22.35 | 22.66 | 83000 |
| 2011-02-04 | 22.29 | 22.33 | 104200 |
| 2011-02-03 | 22.14 | 22.34 | 114000 |
| 2011-02-02 | 22.07 | 22.10 | 107600 |
| 2011-02-01 | 21.50 | 22.16 | 164200 |
| 2011-01-31 | 21.62 | 21.41 | 148900 |
| 2011-01-28 | 21.64 | 21.44 | 214800 |
| 2011-01-27 | 21.55 | 21.70 | 165400 |
| 2011-01-26 | 21.30 | 21.55 | 316700 |
| 2011-01-25 | 20.09 | 20.29 | 159200 |
| 2011-01-24 | 20.09 | 20.26 | 184300 |
| 2011-01-21 | 20.57 | 20.03 | 295200 |
| 2011-01-20 | 20.93 | 20.34 | 404500 |
| 2011-01-19 | 21.40 | 21.10 | 220700 |
| 2011-01-18 | 21.14 | 21.41 | 218400 |
| 2011-01-14 | 21.12 | 21.15 | 121600 |
| 2011-01-13 | 21.16 | 21.08 | 130700 |
| 2011-01-12 | 21.27 | 21.13 | 131400 |
| 2011-01-11 | 20.97 | 21.04 | 124400 |
| 2011-01-10 | 20.52 | 20.87 | 132300 |
| 2011-01-07 | 20.62 | 20.72 | 210400 |
| 2011-01-06 | 20.61 | 20.62 | 125200 |
| 2011-01-05 | 20.17 | 20.67 | 123900 |
| 2011-01-04 | 20.78 | 20.19 | 180300 |
| 2011-01-03 | 20.83 | 20.75 | 287200 |
| 2010-12-31 | 20.78 | 20.59 | 211500 |
| 2010-12-30 | 20.85 | 20.90 | 111100 |
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