| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q2 | 135,080 | -16,105 |
| 2015 | Q1 | 151,185 | -121,227 |
| 2014 | Q4 | 272,412 | +4,180 |
| 2014 | Q3 | 268,232 | -12,029 |
| 2014 | Q2 | 280,261 | +8,719 |
| 2014 | Q1 | 271,542 | +153,272 |
| 2013 | Q4 | 118,270 | -1,773 |
| 2013 | Q3 | 120,043 | -6,247 |
| 2013 | Q2 | 126,290 | +28,468 |
| 2013 | Q1 | 97,822 | -95,230 |
| 2012 | Q4 | 193,052 | -209,151 |
| 2012 | Q3 | 402,203 | +9,067 |
| 2012 | Q2 | 393,136 | -2,944 |
| 2012 | Q1 | 396,080 | +56,346 |
| 2011 | Q4 | 339,734 | -54,733 |
| 2011 | Q3 | 394,467 | -35,710 |
| 2011 | Q2 | 430,177 | -9,048 |
| 2011 | Q1 | 439,225 |