| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 34 | 0 | 100.00 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 34 | 0 | 100.00 |
| 2019 | 1 | 33 | 2.94 |
| 2024 | 0 | 34 | 0.00 |
| 2012 | 34 | 0 | 100.00 |
| 2018 | 30 | 4 | 88.24 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 19 | 15 | 55.88 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 16 | 18 | 47.06 |
| 2010 | 0 | 33 | 0.00 |
| 2017 | 30 | 4 | 88.24 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 232 | 277 | 45.58 |