| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2013 | Q1 | 13,120,665 | +5,577,693 |
| 2012 | Q4 | 7,542,972 | -1,828,139 |
| 2012 | Q3 | 9,371,111 | +2,952,000 |
| 2012 | Q2 | 6,419,111 | -7,816,098 |
| 2012 | Q1 | 14,235,209 | +1,948,561 |
| 2011 | Q4 | 12,286,648 | -585,180 |
| 2011 | Q3 | 12,871,828 | +1,071,135 |
| 2011 | Q2 | 11,800,693 | +7,922,193 |
| 2011 | Q1 | 3,878,500 | -724,600 |
| 2010 | Q4 | 4,603,100 |