| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 34 | 0 | 100.00 |
| 2009 | 0 | 34 | 0.00 |
| 2020 | 17 | 17 | 50.00 |
| 2013 | 34 | 0 | 100.00 |
| 2019 | 4 | 30 | 11.76 |
| 2024 | 5 | 29 | 14.71 |
| 2012 | 34 | 0 | 100.00 |
| 2018 | 32 | 2 | 94.12 |
| 2021 | 29 | 5 | 85.29 |
| 2011 | 34 | 0 | 100.00 |
| 2022 | 31 | 3 | 91.18 |
| 2016 | 19 | 15 | 55.88 |
| 2010 | 32 | 1 | 96.97 |
| 2017 | 29 | 5 | 85.29 |
| 2023 | 6 | 28 | 17.65 |
| Totals | 374 | 169 | 68.88 |