| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 5 | 26 | 16.13 |
| 2009 | 5 | 27 | 15.63 |
| 2010 | 27 | 5 | 84.38 |
| 2011 | 5 | 27 | 15.63 |
| 2012 | 17 | 16 | 51.52 |
| 2013 | 33 | 0 | 100.00 |
| 2014 | 34 | 0 | 100.00 |
| 2015 | 34 | 0 | 100.00 |
| 2016 | 33 | 2 | 94.29 |
| 2017 | 33 | 3 | 91.67 |
| 2018 | 13 | 24 | 35.14 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| Totals | 239 | 350 | 40.58 |