| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2008 | 21.84 | 32.50 | 29.17 |
| 2009 | 16.32 | 21.97 | 34.15 |
| 2010 | 16.05 | 25.76 | 32.29 |
| 2011 | 16.79 | 32.41 | 36.14 |
| 2012 | 13.04 | 25.50 | 36.66 |
| 2013 | 18.48 | 32.88 | 41.32 |
| 2014 | 18.10 | 20.13 | 28.78 |
| 2015 | 17.46 | 23.75 | 34.87 |
| 2016 | 16.67 | 20.69 | 34.98 |
| 2017 | 17.77 | 24.83 | 36.79 |
| 2018 | 18.50 | 21.24 | 37.04 |