| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2014 | Q4 | 7,486,737 | -7,406,025 |
| 2014 | Q3 | 14,892,762 | +2,696,119 |
| 2014 | Q2 | 12,196,643 | +1,394,436 |
| 2014 | Q1 | 10,802,207 | +2,949,666 |
| 2013 | Q4 | 7,852,541 | -555,921 |
| 2013 | Q3 | 8,408,462 | -6,436,401 |
| 2013 | Q2 | 14,844,863 | +144,833 |
| 2013 | Q1 | 14,700,030 | +1,177,305 |
| 2012 | Q4 | 13,522,725 | +526,026 |
| 2012 | Q3 | 12,996,699 | +2,031,447 |
| 2012 | Q2 | 10,965,252 | +2,240,814 |
| 2012 | Q1 | 8,724,438 | +4,207,298 |
| 2011 | Q4 | 4,517,140 | +231,132 |
| 2011 | Q3 | 4,286,008 | +975,284 |
| 2011 | Q2 | 3,310,724 | -172,688 |
| 2011 | Q1 | 3,483,412 |