| Year | Protected | Not Protected | Protected % |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 8 | 24 | 25.00 |
| 2011 | 30 | 2 | 93.75 |
| 2012 | 11 | 22 | 33.33 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 1 | 33 | 2.94 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 2 | 34 | 5.56 |
| 2018 | 0 | 37 | 0.00 |
| 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 | 52 | 518 | 9.12 |