| Year | Protected | Not Protected | Protected % |
| 2011 | 9 | 23 | 28.13 |
| 2012 | 27 | 6 | 81.82 |
| 2013 | 27 | 6 | 81.82 |
| 2014 | 1 | 33 | 2.94 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 13 | 22 | 37.14 |
| 2017 | 6 | 30 | 16.67 |
| 2018 | 23 | 14 | 62.16 |
| 2019 | 14 | 24 | 36.84 |
| 2020 | 36 | 3 | 92.31 |
| 2021 | 4 | 26 | 13.33 |
| 2022 | 1 | 40 | 2.44 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| 2025 | 0 | 42 | 0.00 |
| Totals | 161 | 387 | 29.38 |