| Year | Protected | Not Protected | Protected % |
| 2015 | 29 | 5 | 85.29 |
| 2014 | 1 | 33 | 2.94 |
| 2009 | 34 | 0 | 100.00 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 8 | 26 | 23.53 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 30 | 4 | 88.24 |
| 2018 | 0 | 34 | 0.00 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 28 | 6 | 82.35 |
| 2016 | 29 | 5 | 85.29 |
| 2010 | 33 | 0 | 100.00 |
| 2017 | 16 | 18 | 47.06 |
| Totals | 208 | 267 | 43.79 |