| Year | Protected | Not Protected | Protected % |
| 2015 | 33 | 1 | 97.06 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 0 | 34 | 0.00 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 1 | 33 | 2.94 |
| 2016 | 11 | 23 | 32.35 |
| 2010 | 24 | 9 | 72.73 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 69 | 372 | 15.65 |