| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2007 | -12.82 | -48.28 | -26.08 |
| 2008 | -11.37 | -45.23 | -28.89 |
| 2009 | -12.90 | -50.34 | -30.25 |
| 2010 | -14.02 | -41.08 | -29.30 |
| 2011 | -13.35 | -33.74 | -30.07 |
| 2012 | -14.09 | -39.21 | -29.66 |
| 2013 | -15.92 | -43.95 | -29.07 |
| 2014 | -16.59 | -46.23 | -30.80 |
| 2015 | -17.69 | -50.14 | -30.62 |
| 2016 | -17.84 | -43.09 | -32.16 |