| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 7 | 27 | 20.59 |
| 2020 | 34 | 0 | 100.00 |
| 2013 | 23 | 11 | 67.65 |
| 2019 | 32 | 2 | 94.12 |
| 2012 | 23 | 11 | 67.65 |
| 2018 | 33 | 1 | 97.06 |
| 2021 | 3 | 31 | 8.82 |
| 2011 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 33 | 1 | 97.06 |
| 2017 | 32 | 2 | 94.12 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 254 | 188 | 57.47 |