| Year | Right Handed | Left Handed |
|---|---|---|
| 2007 | 30.37 | 34.97 |
| 2008 | 30.13 | 33.94 |
| 2009 | 29.08 | 32.18 |
| 2010 | 24.35 | 28.16 |
| 2011 | 30.75 | 34.78 |
| 2012 | 26.86 | 27.54 |
| 2013 | 27.56 | 28.17 |
| 2014 | 23.84 | 27.87 |
| 2015 | 24.28 | 30.77 |
| 2016 | 27.97 | 30.04 |
| 2017 | 28.98 | 29.93 |
| 2018 | 31.35 | 34.40 |
| 2019 | 33.33 | 31.25 |