| Year | Protected | Not Protected | Protected % |
| 2010 | 2 | 30 | 6.25 |
| 2011 | 1 | 31 | 3.13 |
| 2012 | 2 | 31 | 6.06 |
| 2013 | 1 | 32 | 3.03 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 24 | 13 | 64.86 |
| 2019 | 5 | 33 | 13.16 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| 2023 | 0 | 42 | 0.00 |
| Totals | 35 | 461 | 7.06 |