| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2009 | 3.77 | 8.82 | 33.33 |
| 2010 | 5.79 | 9.60 | 13.74 |
| 2011 | 4.49 | 12.08 | 10.06 |
| 2012 | 6.13 | 11.49 | 14.94 |
| 2013 | 4.84 | 15.43 | 15.77 |
| 2014 | 6.13 | 9.79 | 15.28 |
| 2015 | 5.90 | 15.61 | 18.25 |
| 2016 | 6.92 | 10.99 | 16.06 |
| 2017 | 6.45 | 10.72 | 14.44 |
| 2018 | 7.09 | 16.90 | 15.94 |
| 2019 | 8.08 | 17.62 | 18.28 |
| 2020 | 11.82 | 9.52 | 19.44 |