| Year | Protected | Not Protected | Protected % |
| 2005 | 0 | 41 | 0.00 |
| 2006 | 6 | 35 | 14.63 |
| 2007 | 15 | 16 | 48.39 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 26 | 6 | 81.25 |
| 2010 | 4 | 28 | 12.50 |
| 2011 | 5 | 27 | 15.63 |
| 2012 | 7 | 26 | 21.21 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 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 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 63 | 651 | 8.82 |