| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2013 | Q1 | 400,000,000 | |
| 2012 | Q4 | 400,000,000 | |
| 2012 | Q3 | 400,000,000 | +200,000,000 |
| 2012 | Q2 | 200,000,000 | |
| 2012 | Q1 | 200,000,000 | |
| 2011 | Q4 | 200,000,000 | |
| 2011 | Q3 | 200,000,000 | |
| 2011 | Q2 | 200,000,000 | |
| 2011 | Q1 | 200,000,000 | |
| 2010 | Q4 | 200,000,000 | |
| 2010 | Q3 | 200,000,000 |