| Year | Protected | Not Protected | Protected % |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 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 | 10 | 29 | 25.64 |
| 2021 | 4 | 26 | 13.33 |
| 2022 | 36 | 5 | 87.80 |
| 2023 | 1 | 41 | 2.38 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 51 | 455 | 10.08 |