| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 18 | 16 | 52.94 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 31 | 3 | 91.18 |
| 2019 | 32 | 2 | 94.12 |
| 2024 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 31 | 3 | 91.18 |
| 2021 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 34 | 0 | 100.00 |
| 2017 | 34 | 0 | 100.00 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 214 | 228 | 48.42 |