| Year | Protected | Not Protected | Protected % |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 2 | 30 | 6.25 |
| 2010 | 2 | 30 | 6.25 |
| 2011 | 4 | 28 | 12.50 |
| 2012 | 22 | 11 | 66.67 |
| 2013 | 33 | 0 | 100.00 |
| 2014 | 15 | 19 | 44.12 |
| 2015 | 34 | 0 | 100.00 |
| 2016 | 34 | 1 | 97.14 |
| 2017 | 36 | 0 | 100.00 |
| 2018 | 9 | 28 | 24.32 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 191 | 410 | 31.78 |