| Year | Protected | Not Protected | Protected % |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 1 | 36 | 2.70 |
| 2019 | 3 | 35 | 7.89 |
| 2020 | 23 | 16 | 58.97 |
| 2021 | 1 | 29 | 3.33 |
| 2022 | 7 | 34 | 17.07 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| Totals | 35 | 566 | 5.82 |