| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2009 | -12.48 | -34.77 | -24.07 |
| 2010 | -12.93 | -33.91 | -26.40 |
| 2011 | -12.78 | -34.58 | -28.08 |
| 2012 | -13.44 | -37.25 | -34.65 |
| 2013 | -12.62 | -36.84 | -34.86 |
| 2014 | -12.14 | -36.54 | -35.17 |
| 2015 | -13.99 | -37.95 | -35.05 |
| 2016 | -14.51 | -36.96 | -41.02 |
| 2017 | -15.55 | -33.80 | -40.68 |
| 2018 | -13.81 | -34.24 | -40.28 |