| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2007 | -1.03 | -0.95 | -1.28 |
| 2008 | -1.08 | -1.04 | -1.37 |
| 2009 | -1.34 | -1.29 | -1.50 |
| 2010 | -1.32 | -1.24 | -1.46 |
| 2012 | -1.29 | -1.18 | -1.39 |
| 2013 | -1.27 | -1.22 | -1.42 |
| 2014 | -1.30 | -1.19 | -1.37 |
| 2015 | -1.19 | -1.12 | -1.37 |
| 2016 | -1.35 | -1.26 | -1.41 |
| 2017 | -1.37 | -1.24 | -1.52 |
| 2018 | -1.60 | -1.50 | -1.78 |
| 2019 | -1.53 | -1.50 | -1.70 |
| 2020 | -1.28 | -1.24 | -1.52 |
| 2021 | -1.23 | -1.19 | -1.40 |