| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2007 | 1.28 | -5.38 | 8.12 |
| 2008 | 3.52 | -5.94 | 8.37 |
| 2009 | 3.65 | -5.63 | 8.65 |
| 2010 | 3.25 | -4.78 | 8.85 |
| 2011 | 2.78 | -5.14 | 9.02 |
| 2012 | 4.49 | -5.73 | 9.47 |
| 2013 | 4.02 | -6.04 | 8.96 |
| 2014 | 3.31 | -6.11 | 8.97 |
| 2015 | 3.09 | -6.42 | 8.59 |
| 2016 | 3.66 | -6.73 | 8.46 |
| 2017 | 3.64 | -4.78 | 8.44 |
| 2018 | 3.04 | -6.33 | 8.15 |
| 2019 | 2.35 | -6.41 | 7.74 |
| 2020 | 2.91 | -6.18 | 7.63 |
| 2021 | 2.47 | -5.93 | 6.32 |