| Year | Protected | Not Protected | Protected % |
| 2012 | 33 | 0 | 100.00 |
| 2013 | 32 | 1 | 96.97 |
| 2014 | 34 | 0 | 100.00 |
| 2015 | 34 | 0 | 100.00 |
| 2016 | 19 | 16 | 54.29 |
| 2017 | 35 | 1 | 97.22 |
| 2018 | 36 | 1 | 97.30 |
| 2019 | 7 | 31 | 18.42 |
| 2020 | 8 | 31 | 20.51 |
| 2021 | 2 | 28 | 6.67 |
| 2022 | 8 | 33 | 19.51 |
| 2023 | 37 | 5 | 88.10 |
| 2024 | 1 | 41 | 2.38 |
| Totals | 286 | 188 | 60.34 |