| Year | Protected | Not Protected | Protected % |
| 2015 | 33 | 1 | 97.06 |
| 2014 | 31 | 3 | 91.18 |
| 2020 | 3 | 31 | 8.82 |
| 2013 | 12 | 22 | 35.29 |
| 2019 | 17 | 17 | 50.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 13 | 21 | 38.24 |
| 2021 | 5 | 29 | 14.71 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 33 | 1 | 97.06 |
| 2017 | 5 | 29 | 14.71 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 152 | 256 | 37.25 |