| Year | Protected | Not Protected | Protected % |
| 2015 | 33 | 1 | 97.06 |
| 2014 | 34 | 0 | 100.00 |
| 2009 | 0 | 34 | 0.00 |
| 2020 | 1 | 33 | 2.94 |
| 2013 | 34 | 0 | 100.00 |
| 2019 | 14 | 20 | 41.18 |
| 2012 | 34 | 0 | 100.00 |
| 2018 | 33 | 1 | 97.06 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 34 | 0 | 100.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 34 | 0 | 100.00 |
| 2010 | 33 | 0 | 100.00 |
| 2017 | 34 | 0 | 100.00 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 318 | 191 | 62.48 |