| Year | Protected | Not Protected | Protected % |
| 2015 | 29 | 5 | 85.29 |
| 2014 | 6 | 28 | 17.65 |
| 2020 | 9 | 25 | 26.47 |
| 2013 | 10 | 24 | 29.41 |
| 2019 | 0 | 34 | 0.00 |
| 2024 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2021 | 25 | 9 | 73.53 |
| 2022 | 4 | 30 | 11.76 |
| 2016 | 12 | 22 | 35.29 |
| 2017 | 1 | 33 | 2.94 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 96 | 346 | 21.72 |