| Year | Protected | Not Protected | Protected % |
| 2010 | 1 | 31 | 3.13 |
| 2011 | 32 | 0 | 100.00 |
| 2012 | 33 | 0 | 100.00 |
| 2013 | 32 | 1 | 96.97 |
| 2014 | 34 | 0 | 100.00 |
| 2015 | 33 | 1 | 97.06 |
| 2016 | 14 | 21 | 40.00 |
| 2017 | 33 | 3 | 91.67 |
| 2018 | 30 | 7 | 81.08 |
| 2019 | 14 | 24 | 36.84 |
| 2020 | 36 | 3 | 92.31 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 1 | 40 | 2.44 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 1 | 41 | 2.38 |
| 2025 | 0 | 42 | 0.00 |
| Totals | 294 | 286 | 50.69 |