| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2017 | Q3 | 868,187 | -122,440 |
| 2017 | Q2 | 990,627 | +63,610 |
| 2017 | Q1 | 927,017 | +205,284 |
| 2016 | Q4 | 721,733 | +119,777 |
| 2016 | Q3 | 601,956 | +84,722 |
| 2016 | Q2 | 517,234 | -96,964 |
| 2016 | Q1 | 614,198 | +59,761 |
| 2015 | Q4 | 554,437 | -33,273 |
| 2015 | Q3 | 587,710 | +45,653 |
| 2015 | Q2 | 542,057 | +100,818 |
| 2015 | Q1 | 441,239 | +58,915 |
| 2014 | Q4 | 382,324 | +139,230 |
| 2014 | Q3 | 243,094 | -2,408 |
| 2014 | Q2 | 245,502 | +64,758 |
| 2014 | Q1 | 180,744 | +37,207 |
| 2013 | Q4 | 143,537 | +42,680 |
| 2013 | Q3 | 100,857 | +14,612 |
| 2013 | Q2 | 86,245 | +57,465 |
| 2013 | Q1 | 28,780 |