| Year | Protected | Not Protected | Protected % |
| 2015 | 7 | 27 | 20.59 |
| 2014 | 32 | 2 | 94.12 |
| 2009 | 0 | 34 | 0.00 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 12 | 22 | 35.29 |
| 2019 | 1 | 33 | 2.94 |
| 2012 | 15 | 19 | 44.12 |
| 2018 | 18 | 16 | 52.94 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 18 | 16 | 52.94 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 10 | 24 | 29.41 |
| 2010 | 32 | 1 | 96.97 |
| 2017 | 33 | 1 | 97.06 |
| Totals | 178 | 297 | 37.47 |