| Year | Right Handed | Left Handed |
|---|---|---|
| 2007 | -26.12 | -25.90 |
| 2008 | -25.49 | -25.06 |
| 2009 | -24.78 | -23.97 |
| 2010 | -23.90 | -24.51 |
| 2011 | -23.41 | -25.39 |
| 2012 | -22.72 | -23.59 |
| 2013 | -21.90 | -23.09 |
| 2014 | -24.41 | -24.07 |
| 2015 | -24.03 | -22.99 |
| 2016 | -21.93 | -20.42 |
| 2017 | -24.08 | -23.63 |
| 2018 | -23.82 | -22.09 |
| 2019 | -25.60 | -24.30 |
| 2020 | -25.24 | -25.12 |
| 2021 | -25.73 | -25.35 |