| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2013 | Q4 | 0 | Liquidated |
| 2013 | Q3 | 139,861 | -5,131 |
| 2013 | Q2 | 144,992 | -21,076 |
| 2013 | Q1 | 166,068 | -156,143 |
| 2012 | Q4 | 322,211 | -134,499 |
| 2012 | Q3 | 456,710 | +204,181 |
| 2012 | Q2 | 252,529 | +38,516 |
| 2012 | Q1 | 214,013 | -272,493 |
| 2011 | Q4 | 486,506 | +9,787 |
| 2011 | Q3 | 476,719 | -18,086 |
| 2011 | Q2 | 494,805 | -49,160 |
| 2011 | Q1 | 543,965 |