| Year | Protected | Not Protected | Protected % |
| 2008 | 14 | 17 | 45.16 |
| 2009 | 30 | 2 | 93.75 |
| 2010 | 18 | 14 | 56.25 |
| 2011 | 5 | 27 | 15.63 |
| 2012 | 29 | 4 | 87.88 |
| 2013 | 29 | 4 | 87.88 |
| 2014 | 33 | 1 | 97.06 |
| 2015 | 33 | 1 | 97.06 |
| 2016 | 6 | 29 | 17.14 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 0 | 37 | 0.00 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 0 | 30 | 0.00 |
| Totals | 197 | 279 | 41.39 |