| Year | Protected | Not Protected | Protected % |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 21 | 13 | 61.76 |
| 2015 | 12 | 22 | 35.29 |
| 2016 | 25 | 10 | 71.43 |
| 2017 | 34 | 2 | 94.44 |
| 2018 | 36 | 1 | 97.30 |
| 2019 | 35 | 3 | 92.11 |
| 2020 | 28 | 11 | 71.79 |
| 2021 | 2 | 28 | 6.67 |
| 2022 | 7 | 34 | 17.07 |
| 2023 | 16 | 26 | 38.10 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 216 | 322 | 40.15 |