| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 10 | 21 | 32.26 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 5 | 28 | 15.15 |
| 2013 | 3 | 30 | 9.09 |
| 2014 | 26 | 8 | 76.47 |
| 2015 | 6 | 28 | 17.65 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 3 | 33 | 8.33 |
| 2018 | 0 | 37 | 0.00 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 53 | 620 | 7.88 |