| Year | In Zone | Out of Zone |
|---|---|---|
| 2007 | 15.98 | 0.00 |
| 2008 | 14.08 | 0.00 |
| 2009 | 13.41 | 0.00 |
| 2010 | 12.67 | 0.00 |
| 2011 | 13.15 | 0.00 |
| 2012 | 12.10 | 0.00 |
| 2013 | 12.71 | 0.00 |
| 2014 | 13.39 | 0.00 |
| 2015 | 12.75 | 0.00 |
| 2016 | 14.28 | 0.00 |
| 2017 | 12.01 | 0.00 |
| 2018 | 13.05 | 0.00 |
| 2019 | 11.83 | 0.00 |
| 2020 | 14.63 | 0.00 |
| 2021 | 12.67 | 0.00 |