| Year | Protected | Not Protected | Protected % |
| 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 | 34 | 0 | 100.00 |
| 2016 | 33 | 2 | 94.29 |
| 2017 | 13 | 23 | 36.11 |
| 2018 | 2 | 35 | 5.41 |
| 2019 | 24 | 14 | 63.16 |
| 2020 | 29 | 10 | 74.36 |
| 2021 | 7 | 23 | 23.33 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| 2024 | 0 | 42 | 0.00 |
| 2025 | 0 | 42 | 0.00 |
| Totals | 142 | 470 | 23.20 |