| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2008 | 8.66 | 38.46 | 37.50 |
| 2009 | 12.56 | 27.27 | 25.00 |
| 2010 | 11.22 | 30.43 | 30.00 |
| 2011 | 17.63 | 32.73 | 42.68 |
| 2012 | 19.65 | 31.82 | 45.16 |
| 2013 | 17.41 | 28.66 | 49.34 |
| 2014 | 18.27 | 34.50 | 43.78 |
| 2015 | 19.22 | 26.19 | 26.89 |
| 2016 | 16.81 | 28.27 | 30.41 |
| 2017 | 18.97 | 25.52 | 34.27 |
| 2018 | 18.97 | 20.20 | 40.00 |