| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q2 | 82,798 | -5,522 |
| 2015 | Q1 | 88,320 | -14,337 |
| 2014 | Q4 | 102,657 | -35,156 |
| 2014 | Q3 | 137,813 | -11,919 |
| 2014 | Q2 | 149,732 | -5,570 |
| 2014 | Q1 | 155,302 | -25,745 |
| 2013 | Q4 | 181,047 | -52,998 |
| 2013 | Q3 | 234,045 | -38,328 |
| 2013 | Q2 | 272,373 | -20,601 |
| 2013 | Q1 | 292,974 | -39,187 |
| 2012 | Q4 | 332,161 | +15,391 |
| 2012 | Q3 | 316,770 | -46,991 |
| 2012 | Q2 | 363,761 | -63,940 |
| 2012 | Q1 | 427,701 | +45,891 |
| 2011 | Q4 | 381,810 | -190,228 |
| 2011 | Q3 | 572,038 | -7,747 |
| 2011 | Q2 | 579,785 | -86,465 |
| 2011 | Q1 | 666,250 |