| Year | Protected | Not Protected | Protected % |
| 2009 | 1 | 31 | 3.13 |
| 2010 | 6 | 26 | 18.75 |
| 2011 | 10 | 22 | 31.25 |
| 2012 | 30 | 3 | 90.91 |
| 2013 | 28 | 5 | 84.85 |
| 2014 | 25 | 9 | 73.53 |
| 2015 | 3 | 31 | 8.82 |
| 2016 | 3 | 32 | 8.57 |
| 2017 | 4 | 32 | 11.11 |
| 2018 | 33 | 4 | 89.19 |
| 2019 | 10 | 28 | 26.32 |
| 2020 | 2 | 37 | 5.13 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 155 | 415 | 27.19 |