| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2007 | 6.01 | -8.08 | 5.87 |
| 2008 | 5.73 | -7.37 | 5.15 |
| 2009 | 5.85 | -6.92 | 3.46 |
| 2010 | 5.89 | -6.45 | 3.35 |
| 2011 | 5.96 | -7.97 | 3.40 |
| 2012 | 6.67 | -6.34 | 3.02 |
| 2013 | 6.74 | -6.01 | 2.07 |
| 2014 | 5.89 | -5.71 | 1.90 |
| 2015 | 6.18 | -4.87 | 2.76 |
| 2016 | 6.90 | -5.18 | 3.35 |
| 2017 | 5.87 | -4.77 | 2.24 |