| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2014 | Q3 | 0 | Liquidated |
| 2014 | Q2 | 276,588 | -534,312 |
| 2014 | Q1 | 810,900 | -8,500 |
| 2013 | Q4 | 819,400 | +35,800 |
| 2013 | Q3 | 783,600 | +3,300 |
| 2013 | Q2 | 780,300 | +6,100 |
| 2013 | Q1 | 774,200 | -4,200 |
| 2012 | Q4 | 778,400 | -32,100 |
| 2012 | Q3 | 810,500 | +13,700 |
| 2012 | Q2 | 796,800 | -13,200 |
| 2012 | Q1 | 810,000 | +900 |
| 2011 | Q4 | 809,100 | -100 |
| 2011 | Q3 | 809,200 | -117,400 |
| 2011 | Q2 | 926,600 |