| Year | Protected | Not Protected | Protected % |
| 2015 | 2 | 32 | 5.88 |
| 2014 | 5 | 29 | 14.71 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 0 | 34 | 0.00 |
| 2017 | 1 | 33 | 2.94 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 8 | 434 | 1.81 |