| 2011-02-14 | 2.95 | 2.85 | 1400 |
| 2011-02-11 | 2.94 | 2.90 | 7400 |
| 2011-02-10 | 2.68 | 2.75 | 2200 |
| 2011-02-09 | 2.68 | 2.75 | 9600 |
| 2011-02-08 | 2.75 | 2.68 | 21000 |
| 2011-02-07 | 3.37 | 2.81 | 6400 |
| 2011-02-04 | 2.82 | 2.90 | 1200 |
| 2011-02-03 | 2.84 | 2.80 | 9300 |
| 2011-02-02 | 2.78 | 2.80 | 3900 |
| 2011-02-01 | 2.99 | 3.00 | 3000 |
| 2011-01-31 | 2.85 | 2.93 | 23600 |
| 2011-01-28 | 2.82 | 2.75 | 5300 |
| 2011-01-27 | 2.86 | 2.84 | 1800 |
| 2011-01-26 | 2.96 | 2.87 | 5700 |
| 2011-01-25 | 2.75 | 2.80 | 3100 |
| 2011-01-24 | 2.75 | 2.75 | 3200 |
| 2011-01-21 | 3.10 | 2.72 | 9700 |
| 2011-01-20 | 2.85 | 3.00 | 5800 |
| 2011-01-19 | 3.35 | 3.15 | 6600 |
| 2011-01-18 | 3.25 | 3.10 | 25800 |
| 2011-01-14 | 2.37 | 2.90 | 55200 |
| 2011-01-13 | 2.25 | 2.37 | 33800 |
| 2011-01-12 | 2.19 | 2.25 | 22400 |
| 2011-01-11 | 2.11 | 2.20 | 5500 |
| 2011-01-10 | 2.15 | 2.08 | 5200 |
| 2011-01-07 | 2.08 | 2.18 | 20400 |
| 2011-01-06 | 2.00 | 2.08 | 38700 |
| 2011-01-05 | 2.14 | 2.00 | 27900 |
| 2011-01-04 | 2.13 | 2.01 | 24100 |
| 2011-01-03 | 2.27 | 2.13 | 14500 |
| 2010-12-31 | 2.17 | 2.20 | 21500 |
| 2010-12-30 | 2.33 | 2.27 | 5100 |
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