| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2014 | 5 | 29 | 14.71 |
| 2009 | 10 | 24 | 29.41 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2013 | 26 | 8 | 76.47 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 2 | 32 | 5.88 |
| 2012 | 34 | 0 | 100.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 34 | 0 | 100.00 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 27 | 6 | 81.82 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 138 | 336 | 29.11 |