| 2011-04-07 | 27.50 | 26.65 | 108100 |
| 2011-04-06 | 26.65 | 27.40 | 252500 |
| 2011-04-05 | 26.02 | 25.84 | 91500 |
| 2011-04-04 | 26.26 | 26.10 | 89400 |
| 2011-04-01 | 24.70 | 26.15 | 292200 |
| 2011-03-31 | 24.46 | 24.60 | 118400 |
| 2011-03-30 | 24.50 | 24.53 | 139800 |
| 2011-03-29 | 24.54 | 24.52 | 124900 |
| 2011-03-28 | 24.56 | 24.59 | 101800 |
| 2011-03-25 | 24.53 | 24.55 | 78700 |
| 2011-03-24 | 24.32 | 24.43 | 65900 |
| 2011-03-23 | 23.79 | 24.27 | 133800 |
| 2011-03-22 | 23.83 | 24.35 | 104200 |
| 2011-03-21 | 23.32 | 23.85 | 91100 |
| 2011-03-18 | 23.26 | 23.10 | 128500 |
| 2011-03-17 | 23.39 | 23.16 | 90500 |
| 2011-03-16 | 24.06 | 23.76 | 90600 |
| 2011-03-15 | 24.06 | 24.16 | 67900 |
| 2011-03-14 | 25.32 | 24.58 | 175800 |
| 2011-03-11 | 25.68 | 25.47 | 91300 |
| 2011-03-10 | 26.02 | 25.85 | 143200 |
| 2011-03-09 | 25.90 | 26.18 | 218300 |
| 2011-03-08 | 25.46 | 25.88 | 211800 |
| 2011-03-07 | 25.75 | 25.57 | 134900 |
| 2011-03-04 | 25.68 | 25.59 | 179900 |
| 2011-03-03 | 26.06 | 25.62 | 266400 |
| 2011-03-02 | 25.59 | 26.06 | 274400 |
| 2011-03-01 | 25.34 | 25.64 | 277200 |
| 2011-02-28 | 24.43 | 25.24 | 385500 |
| 2011-02-25 | 23.69 | 24.26 | 133100 |
| 2011-02-24 | 22.93 | 23.59 | 172900 |
| 2011-02-23 | 23.17 | 22.94 | 216500 |
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