| Year | Right Handed | Left Handed |
|---|---|---|
| 2008 | 7.97 | 13.42 |
| 2009 | 9.29 | 14.71 |
| 2010 | 8.75 | 18.76 |
| 2011 | 10.91 | 16.69 |
| 2012 | 10.56 | 16.82 |
| 2013 | 11.10 | 18.25 |
| 2014 | 14.68 | 15.85 |
| 2015 | 15.71 | 18.14 |
| 2016 | 14.60 | 18.00 |
| 2017 | 14.34 | 14.04 |
| 2018 | 10.70 | 14.83 |
| 2019 | 13.76 | 16.26 |
| 2020 | 15.27 | 14.85 |
| 2021 | 17.09 | 15.74 |