| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2007 | -0.66 | -0.39 | -0.77 |
| 2008 | -0.82 | -0.69 | -0.85 |
| 2009 | -0.97 | -0.92 | -1.08 |
| 2010 | -0.93 | -1.00 | -1.17 |
| 2011 | -1.00 | -1.20 | -1.27 |
| 2012 | -0.93 | -1.09 | -1.17 |
| 2013 | -0.91 | -1.11 | -1.13 |
| 2014 | -1.04 | -1.19 | -1.22 |
| 2015 | -0.55 | -0.67 | -0.80 |
| 2016 | -0.90 | -1.11 | -1.07 |