| Year | Protected | Not Protected | Protected % |
| 2015 | 1 | 33 | 2.94 |
| 2014 | 5 | 29 | 14.71 |
| 2009 | 19 | 15 | 55.88 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 27 | 7 | 79.41 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 7 | 27 | 20.59 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 33 | 1 | 97.06 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 16 | 17 | 48.48 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 108 | 333 | 24.49 |