| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2014 | Q3 | 7,777 | -1,020 |
| 2014 | Q2 | 8,797 | -4,674 |
| 2014 | Q1 | 13,471 | -5,755 |
| 2013 | Q4 | 19,226 | +5,541 |
| 2013 | Q3 | 13,685 | +746 |
| 2013 | Q2 | 12,939 | -212 |
| 2013 | Q1 | 13,151 | -5,041 |
| 2012 | Q4 | 18,192 | -1,584 |
| 2012 | Q3 | 19,776 | -2,243 |
| 2012 | Q2 | 22,019 | -3,914 |
| 2012 | Q1 | 25,933 | -9,534 |
| 2011 | Q4 | 35,467 | -9,951 |
| 2011 | Q3 | 45,418 | -4,162 |
| 2011 | Q2 | 49,580 | -14,519 |
| 2011 | Q1 | 64,099 |