| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q4 | 38,764 | +6,962 |
| 2015 | Q3 | 31,802 | -5,823 |
| 2015 | Q2 | 37,625 | -1,014 |
| 2015 | Q1 | 38,639 | -4,558 |
| 2014 | Q4 | 43,197 | -8,023 |
| 2014 | Q3 | 51,220 | +6,952 |
| 2014 | Q2 | 44,268 | +9,870 |
| 2014 | Q1 | 34,398 | -4,644 |
| 2013 | Q4 | 39,042 | +9,626 |
| 2013 | Q3 | 29,416 | +7,644 |
| 2013 | Q2 | 21,772 | -3,031 |
| 2013 | Q1 | 24,803 | +1,037 |
| 2012 | Q4 | 23,766 | -1,776 |
| 2012 | Q3 | 25,542 | +570 |
| 2012 | Q2 | 24,972 | -2,002 |
| 2012 | Q1 | 26,974 | +17,566 |
| 2011 | Q4 | 9,408 | -2,819 |
| 2011 | Q3 | 12,227 | -460 |
| 2011 | Q2 | 12,687 | -68 |
| 2011 | Q1 | 12,755 |