| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 32 | 2 | 94.12 |
| 2020 | 34 | 0 | 100.00 |
| 2013 | 34 | 0 | 100.00 |
| 2019 | 33 | 1 | 97.06 |
| 2024 | 1 | 33 | 2.94 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 34 | 0 | 100.00 |
| 2021 | 34 | 0 | 100.00 |
| 2022 | 34 | 0 | 100.00 |
| 2016 | 34 | 0 | 100.00 |
| 2017 | 34 | 0 | 100.00 |
| 2023 | 17 | 17 | 50.00 |
| Totals | 355 | 87 | 80.32 |