| Year | Protected | Not Protected | Protected % |
| 2015 | 22 | 12 | 64.71 |
| 2014 | 29 | 5 | 85.29 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 31 | 3 | 91.18 |
| 2019 | 0 | 34 | 0.00 |
| 2024 | 0 | 34 | 0.00 |
| 2012 | 22 | 12 | 64.71 |
| 2018 | 1 | 33 | 2.94 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 31 | 3 | 91.18 |
| 2017 | 13 | 21 | 38.24 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 149 | 327 | 31.30 |