| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2008 | 6.99 | 24.00 | 16.33 |
| 2009 | 8.43 | 16.67 | 12.44 |
| 2010 | 6.84 | 14.78 | 16.23 |
| 2011 | 8.41 | 14.75 | 14.29 |
| 2012 | 10.57 | 15.38 | 12.50 |
| 2013 | 8.22 | 18.39 | 12.35 |
| 2014 | 7.70 | 15.65 | 11.67 |
| 2015 | 7.78 | 15.49 | 13.01 |
| 2016 | 9.01 | 14.37 | 10.28 |
| 2017 | 7.64 | 11.15 | 11.42 |
| 2018 | 10.36 | 16.97 | 16.33 |
| 2019 | 6.78 | 11.32 | 16.18 |