| Year | Right Handed | Left Handed |
|---|---|---|
| 2007 | 19.48 | 22.93 |
| 2008 | 20.56 | 19.64 |
| 2009 | 22.61 | 26.11 |
| 2010 | 21.75 | 21.72 |
| 2011 | 21.54 | 27.25 |
| 2012 | 23.99 | 26.74 |
| 2013 | 23.70 | 26.07 |
| 2014 | 19.91 | 20.52 |
| 2015 | 23.42 | 21.99 |
| 2016 | 25.33 | 28.45 |
| 2017 | 23.59 | 24.60 |
| 2018 | 28.82 | 33.22 |
| 2019 | 30.05 | 32.44 |