| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2013 | Q1 | 68,121,984 | +6,500 |
| 2012 | Q4 | 68,115,484 | +597,588 |
| 2012 | Q3 | 67,517,896 | +872,500 |
| 2012 | Q2 | 66,645,396 | +2,249,696 |
| 2012 | Q1 | 64,395,700 | +489,769 |
| 2011 | Q4 | 63,905,931 | +6,556,947 |
| 2011 | Q3 | 57,348,984 | +32,494,240 |
| 2011 | Q2 | 24,854,744 | +20,336,970 |
| 2011 | Q1 | 4,517,774 |