| Year | Protected | Not Protected | Protected % |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 4 | 28 | 12.50 |
| 2012 | 30 | 3 | 90.91 |
| 2013 | 33 | 0 | 100.00 |
| 2014 | 33 | 1 | 97.06 |
| 2015 | 34 | 0 | 100.00 |
| 2016 | 30 | 5 | 85.71 |
| 2017 | 20 | 16 | 55.56 |
| 2018 | 36 | 1 | 97.30 |
| 2019 | 34 | 4 | 89.47 |
| 2020 | 9 | 30 | 23.08 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 1 | 41 | 2.38 |
| Totals | 264 | 274 | 49.07 |