| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2014 | Q3 | 1,693 | +41 |
| 2014 | Q2 | 1,652 | -109 |
| 2014 | Q1 | 1,761 | +128 |
| 2013 | Q4 | 1,633 | -44 |
| 2013 | Q3 | 1,677 | -157 |
| 2013 | Q2 | 1,834 | +163 |
| 2013 | Q1 | 1,671 | -395 |
| 2012 | Q4 | 2,066 | -58 |
| 2012 | Q3 | 2,124 | -1,043 |
| 2012 | Q2 | 3,167 | -684 |
| 2012 | Q1 | 3,851 | +89 |
| 2011 | Q4 | 3,762 | -806 |
| 2011 | Q3 | 4,568 | -1,625 |
| 2011 | Q2 | 6,193 | -877 |
| 2011 | Q1 | 7,070 |