| Year | Protected | Not Protected | Protected % |
| 2015 | 27 | 7 | 79.41 |
| 2014 | 34 | 0 | 100.00 |
| 2009 | 34 | 0 | 100.00 |
| 2020 | 4 | 30 | 11.76 |
| 2013 | 27 | 7 | 79.41 |
| 2019 | 11 | 23 | 32.35 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 33 | 1 | 97.06 |
| 2018 | 2 | 32 | 5.88 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 34 | 0 | 100.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 11 | 23 | 32.35 |
| 2010 | 33 | 0 | 100.00 |
| 2017 | 13 | 21 | 38.24 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 263 | 280 | 48.43 |