| Year | Protected | Not Protected | Protected % |
| 2015 | 11 | 23 | 32.35 |
| 2014 | 5 | 29 | 14.71 |
| 2020 | 3 | 31 | 8.82 |
| 2013 | 2 | 32 | 5.88 |
| 2019 | 0 | 34 | 0.00 |
| 2024 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 3 | 31 | 8.82 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 20 | 14 | 58.82 |
| 2010 | 0 | 33 | 0.00 |
| 2017 | 7 | 27 | 20.59 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 51 | 458 | 10.02 |