| Year | Protected | Not Protected | Protected % |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 16 | 17 | 48.48 |
| 2013 | 32 | 1 | 96.97 |
| 2014 | 34 | 0 | 100.00 |
| 2015 | 32 | 2 | 94.12 |
| 2016 | 25 | 10 | 71.43 |
| 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 | 142 | 428 | 24.91 |