| Year | Protected | Not Protected | Protected % |
| 2015 | 14 | 20 | 41.18 |
| 2014 | 22 | 12 | 64.71 |
| 2009 | 0 | 34 | 0.00 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 32 | 2 | 94.12 |
| 2019 | 0 | 34 | 0.00 |
| 2012 | 34 | 0 | 100.00 |
| 2018 | 0 | 34 | 0.00 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 34 | 0 | 100.00 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 24 | 9 | 72.73 |
| 2017 | 2 | 32 | 5.88 |
| Totals | 162 | 279 | 36.73 |