| Year | Protected | Not Protected | Protected % |
| 2015 | 33 | 1 | 97.06 |
| 2014 | 29 | 5 | 85.29 |
| 2020 | 33 | 1 | 97.06 |
| 2013 | 18 | 16 | 52.94 |
| 2019 | 34 | 0 | 100.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 34 | 0 | 100.00 |
| 2021 | 8 | 26 | 23.53 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 33 | 1 | 97.06 |
| 2017 | 34 | 0 | 100.00 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 256 | 152 | 62.75 |