| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2014 | Q3 | 1,888 | +392 |
| 2014 | Q2 | 1,496 | -87 |
| 2014 | Q1 | 1,583 | -252 |
| 2013 | Q4 | 1,835 | -49 |
| 2013 | Q3 | 1,884 | -114 |
| 2013 | Q2 | 1,998 | -95 |
| 2013 | Q1 | 2,093 | -679 |
| 2012 | Q4 | 2,772 | -87 |
| 2012 | Q3 | 2,859 | -88 |
| 2012 | Q2 | 2,947 | -610 |
| 2012 | Q1 | 3,557 | +118 |
| 2011 | Q4 | 3,439 | -702 |
| 2011 | Q3 | 4,141 | -1,441 |
| 2011 | Q2 | 5,582 | -1,033 |
| 2011 | Q1 | 6,615 |