| Year | Protected | Not Protected | Protected % |
| 2011 | 1 | 31 | 3.13 |
| 2012 | 33 | 0 | 100.00 |
| 2013 | 31 | 2 | 93.94 |
| 2014 | 34 | 0 | 100.00 |
| 2015 | 24 | 10 | 70.59 |
| 2016 | 35 | 0 | 100.00 |
| 2017 | 30 | 6 | 83.33 |
| 2018 | 34 | 3 | 91.89 |
| 2019 | 6 | 32 | 15.79 |
| 2020 | 1 | 38 | 2.56 |
| 2021 | 2 | 28 | 6.67 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 231 | 275 | 45.65 |