| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q2 | 43,387 | +11,683 |
| 2015 | Q1 | 31,704 | -8,590 |
| 2014 | Q4 | 40,294 | -2,181 |
| 2014 | Q3 | 42,475 | -2,096 |
| 2014 | Q2 | 44,571 | -6,007 |
| 2014 | Q1 | 50,578 | -8,828 |
| 2013 | Q4 | 59,406 | -14,142 |
| 2013 | Q3 | 73,548 | +8,124 |
| 2013 | Q2 | 65,424 | +16,823 |
| 2013 | Q1 | 48,601 | -19,675 |
| 2012 | Q4 | 68,276 | -1,811 |
| 2012 | Q3 | 70,087 | -16,096 |
| 2012 | Q2 | 86,183 | -46,216 |
| 2012 | Q1 | 132,399 | -25,903 |
| 2011 | Q4 | 158,302 |