| 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 | 3 | 35 | 7.89 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 1 | 29 | 3.33 |
| 2022 | 1 | 40 | 2.44 |
| 2023 | 1 | 41 | 2.38 |
| 2024 | 9 | 33 | 21.43 |
| 2025 | 8 | 34 | 19.05 |
| Totals | 23 | 525 | 4.20 |