| Date | Value |
|---|---|
| 2011-08-17 | 55,912 |
| 2011-08-16 | 53,390 |
| 2011-08-11 | 52,434 |
| 2011-08-01 | 51,336 |
| 2011-07-04 | 45,283 |
| 2011-06-25 | 35,173 |
| 2011-06-21 | 30,249 |
| 2011-06-13 | 28,719 |
| 2011-05-31 | 24,372 |
| 2011-05-24 | 20,353 |
| 2011-05-06 | 17,400 |
| 2011-03-30 | 12,967 |
| 2011-03-07 | 11,584 |
| 2011-03-04 | 8,968 |
| 2011-01-19 | 4,898 |