| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2012 | Q3 | 2,489,730 | -5,209,923 |
| 2012 | Q2 | 7,699,653 | -17,157,600 |
| 2012 | Q1 | 24,857,253 | -1,435,489 |
| 2011 | Q4 | 26,292,742 | -6,776,700 |
| 2011 | Q3 | 33,069,442 | +2,510,000 |
| 2011 | Q2 | 30,559,442 | +5,932,200 |
| 2011 | Q1 | 24,627,242 | -10,944,332 |
| 2010 | Q4 | 35,571,574 |