| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q3 | 12,568 | -533 |
| 2015 | Q2 | 13,101 | -3,465 |
| 2015 | Q1 | 16,566 | -1,656 |
| 2014 | Q4 | 18,222 | -1,239 |
| 2014 | Q3 | 19,461 | +2,888 |
| 2014 | Q2 | 16,573 | +4,724 |
| 2014 | Q1 | 11,849 | -2,428 |
| 2013 | Q4 | 14,277 | +4,231 |
| 2013 | Q3 | 10,046 | +3,618 |
| 2013 | Q2 | 6,428 | -1,071 |
| 2013 | Q1 | 7,499 | +970 |
| 2012 | Q4 | 6,529 | -207 |
| 2012 | Q3 | 6,736 | -2,909 |
| 2012 | Q2 | 9,645 | -757 |
| 2012 | Q1 | 10,402 | +6,785 |
| 2011 | Q4 | 3,617 | -1,033 |
| 2011 | Q3 | 4,650 | -234 |
| 2011 | Q2 | 4,884 | +31 |
| 2011 | Q1 | 4,853 |