| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 34 | 0 | 100.00 |
| 2020 | 33 | 1 | 97.06 |
| 2013 | 34 | 0 | 100.00 |
| 2019 | 31 | 3 | 91.18 |
| 2024 | 0 | 34 | 0.00 |
| 2012 | 34 | 0 | 100.00 |
| 2018 | 34 | 0 | 100.00 |
| 2021 | 4 | 30 | 11.76 |
| 2011 | 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 | 306 | 170 | 64.29 |