| 2011-04-07 | 19.83 | 19.79 | 760000 |
| 2011-04-06 | 20.57 | 20.45 | 533000 |
| 2011-04-05 | 20.50 | 20.45 | 914400 |
| 2011-04-04 | 20.43 | 20.33 | 442600 |
| 2011-04-01 | 19.93 | 20.29 | 493700 |
| 2011-03-31 | 19.86 | 19.74 | 570500 |
| 2011-03-30 | 19.74 | 19.82 | 335300 |
| 2011-03-29 | 19.58 | 19.68 | 484700 |
| 2011-03-28 | 19.99 | 19.58 | 461300 |
| 2011-03-25 | 19.97 | 19.93 | 487600 |
| 2011-03-24 | 19.96 | 19.86 | 811500 |
| 2011-03-23 | 19.75 | 19.98 | 936600 |
| 2011-03-22 | 19.54 | 19.78 | 1351300 |
| 2011-03-21 | 19.30 | 19.50 | 1117200 |
| 2011-03-18 | 19.60 | 19.20 | 2126500 |
| 2011-03-17 | 20.49 | 20.00 | 1003700 |
| 2011-03-16 | 20.69 | 20.22 | 617400 |
| 2011-03-15 | 20.09 | 20.79 | 1055900 |
| 2011-03-14 | 20.87 | 20.79 | 547700 |
| 2011-03-11 | 20.78 | 20.96 | 642900 |
| 2011-03-10 | 21.00 | 20.71 | 515200 |
| 2011-03-09 | 21.44 | 21.25 | 508700 |
| 2011-03-08 | 21.32 | 21.46 | 651300 |
| 2011-03-07 | 21.78 | 21.29 | 406600 |
| 2011-03-04 | 21.87 | 21.70 | 983600 |
| 2011-03-03 | 22.20 | 22.05 | 1686200 |
| 2011-03-02 | 20.87 | 21.91 | 1709000 |
| 2011-03-01 | 21.32 | 21.04 | 783900 |
| 2011-02-28 | 21.47 | 21.43 | 611300 |
| 2011-02-25 | 21.24 | 21.18 | 820700 |
| 2011-02-24 | 20.33 | 21.13 | 916500 |
| 2011-02-23 | 21.04 | 20.27 | 1106900 |
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