| Year | Protected | Not Protected | Protected % |
| 2010 | 4 | 28 | 12.50 |
| 2011 | 3 | 29 | 9.38 |
| 2012 | 1 | 32 | 3.03 |
| 2013 | 23 | 10 | 69.70 |
| 2014 | 27 | 7 | 79.41 |
| 2015 | 30 | 4 | 88.24 |
| 2016 | 19 | 16 | 54.29 |
| 2017 | 34 | 2 | 94.44 |
| 2018 | 34 | 3 | 91.89 |
| 2019 | 37 | 1 | 97.37 |
| 2020 | 38 | 1 | 97.44 |
| 2021 | 5 | 25 | 16.67 |
| 2022 | 21 | 20 | 51.22 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 276 | 262 | 51.30 |