| Date | Value |
|---|
| Jun 01, 2012 | 19,330.00 |
| May 31, 2012 | 19,725.00 |
| May 30, 2012 | 19,805.00 |
| May 29, 2012 | 20,100.00 |
| May 28, 2012 | 19,855.00 |
| May 25, 2012 | 19,850.00 |
| May 24, 2012 | 19,655.00 |
| May 23, 2012 | 19,305.00 |
| May 22, 2012 | 19,460.00 |
| May 21, 2012 | 19,450.00 |
| May 18, 2012 | 19,400.00 |
| May 17, 2012 | 19,450.00 |
| May 16, 2012 | 19,780.00 |
| May 15, 2012 | 20,200.00 |
| May 14, 2012 | 20,275.00 |
| May 11, 2012 | 20,255.00 |
| May 10, 2012 | 20,645.00 |
| May 09, 2012 | 20,850.00 |
| May 08, 2012 | 21,340.00 |
| May 04, 2012 | 21,775.00 |
| May 03, 2012 | 22,005.00 |
| May 02, 2012 | 22,250.00 |
| May 01, 2012 | 22,725.00 |
| Apr 30, 2012 | 22,625.00 |
| Apr 27, 2012 | 22,405.00 |
| Apr 26, 2012 | 22,495.00 |
| Apr 25, 2012 | 21,700.00 |
| Apr 24, 2012 | 21,390.00 |
| Apr 23, 2012 | 21,065.00 |
| Apr 20, 2012 | 21,255.00 |
| Apr 19, 2012 | 21,060.00 |
| Apr 18, 2012 | 21,170.00 |
| Apr 17, 2012 | 21,250.00 |
| Apr 16, 2012 | 21,650.00 |
| Apr 13, 2012 | 22,650.00 |
| Apr 12, 2012 | 22,625.00 |
| Apr 11, 2012 | 22,650.00 |
| Apr 10, 2012 | 22,850.00 |
| Apr 05, 2012 | 22,500.00 |
| Apr 04, 2012 | 22,550.00 |
| Apr 03, 2012 | 23,100.00 |
| Apr 02, 2012 | 22,750.00 |
| Mar 30, 2012 | 23,200.00 |
| Mar 29, 2012 | 22,350.00 |
| Mar 28, 2012 | 22,450.00 |
| Mar 27, 2012 | 22,475.00 |
| Mar 26, 2012 | 22,375.00 |
| Mar 23, 2012 | 22,350.00 |
| Mar 22, 2012 | 22,325.00 |
| Mar 21, 2012 | 23,305.00 |
| Mar 20, 2012 | 23,170.00 |
| Mar 19, 2012 | 23,625.00 |
| Mar 16, 2012 | 23,800.00 |
| Mar 15, 2012 | 23,530.00 |
| Mar 14, 2012 | 23,900.00 |
| Mar 13, 2012 | 23,450.00 |
| Mar 12, 2012 | 22,905.00 |
| Mar 09, 2012 | 22,660.00 |
| Mar 08, 2012 | 22,900.00 |
| Mar 07, 2012 | 22,450.00 |
| Mar 06, 2012 | 22,700.00 |
| Mar 05, 2012 | 22,905.00 |
| Mar 02, 2012 | 23,650.00 |
| Mar 01, 2012 | 23,880.00 |