| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q2 | 50,637 | +4,082 |
| 2015 | Q1 | 46,555 | -4,335 |
| 2014 | Q4 | 50,890 | -6,912 |
| 2014 | Q3 | 57,802 | +576 |
| 2014 | Q2 | 57,226 | -116 |
| 2014 | Q1 | 57,342 | +1,708 |
| 2013 | Q4 | 55,634 | -2,029 |
| 2013 | Q3 | 57,663 | +3,919 |
| 2013 | Q2 | 53,744 | +7,483 |
| 2013 | Q1 | 46,261 | -892 |
| 2012 | Q4 | 47,153 | -9,295 |
| 2012 | Q3 | 56,448 | +4,539 |
| 2012 | Q2 | 51,909 | -2,342 |
| 2012 | Q1 | 54,251 | +811 |
| 2011 | Q4 | 53,440 |