| Year | Protected | Not Protected | Protected % |
| 2015 | 7 | 27 | 20.59 |
| 2014 | 4 | 30 | 11.76 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 15 | 19 | 44.12 |
| 2019 | 1 | 33 | 2.94 |
| 2012 | 11 | 23 | 32.35 |
| 2018 | 1 | 33 | 2.94 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 1 | 33 | 2.94 |
| 2017 | 3 | 31 | 8.82 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 43 | 399 | 9.73 |