| Year | Protected | Not Protected | Protected % |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 2 | 30 | 6.25 |
| 2011 | 25 | 7 | 78.13 |
| 2012 | 31 | 2 | 93.94 |
| 2013 | 33 | 0 | 100.00 |
| 2014 | 34 | 0 | 100.00 |
| 2015 | 34 | 0 | 100.00 |
| 2016 | 35 | 0 | 100.00 |
| 2017 | 36 | 0 | 100.00 |
| 2018 | 37 | 0 | 100.00 |
| 2019 | 38 | 0 | 100.00 |
| 2020 | 18 | 21 | 46.15 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 323 | 247 | 56.67 |