| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q1 | 3,580,863 | +712,372 |
| 2014 | Q4 | 2,868,491 | +350,933 |
| 2014 | Q3 | 2,517,558 | +914,262 |
| 2014 | Q2 | 1,603,296 | +564,214 |
| 2014 | Q1 | 1,039,082 | +49,522 |
| 2013 | Q4 | 989,560 | -15,691 |
| 2013 | Q3 | 1,005,251 | -122,856 |
| 2013 | Q2 | 1,128,107 | -72,992 |
| 2013 | Q1 | 1,201,099 | +210,631 |
| 2012 | Q4 | 990,468 | +169,023 |
| 2012 | Q3 | 821,445 | +215,007 |
| 2012 | Q2 | 606,438 | +51,563 |
| 2012 | Q1 | 554,875 | +55,505 |
| 2011 | Q4 | 499,370 | +96,665 |
| 2011 | Q3 | 402,705 | -149,154 |
| 2011 | Q2 | 551,859 | +104,678 |
| 2011 | Q1 | 447,181 |