| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2013 | Q1 | 4,680,000 | +1,915,000 |
| 2012 | Q4 | 2,765,000 | -1,843,000 |
| 2012 | Q3 | 4,608,000 | -58,000 |
| 2012 | Q2 | 4,666,000 | -3,364,000 |
| 2012 | Q1 | 8,030,000 | +5,566,600 |
| 2011 | Q4 | 2,463,400 | +1,887,300 |
| 2011 | Q3 | 576,100 | -3,373,900 |
| 2011 | Q2 | 3,950,000 | -2,247,700 |
| 2011 | Q1 | 6,197,700 |