| Year | Right Handed | Left Handed |
|---|---|---|
| 2008 | 8.19 | 7.84 |
| 2009 | 7.28 | 8.21 |
| 2010 | 9.67 | 7.78 |
| 2011 | 9.04 | 7.16 |
| 2012 | 9.25 | 6.74 |
| 2013 | 9.11 | 8.33 |
| 2014 | 9.22 | 7.57 |
| 2015 | 8.71 | 9.03 |
| 2016 | 12.41 | 11.47 |
| 2017 | 10.29 | 13.30 |
| 2018 | 11.65 | 14.09 |
| 2019 | 13.54 | 13.99 |
| 2020 | 10.77 | 14.81 |
| 2021 | 12.65 | 13.81 |