| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2006 | 0 | 36 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 34 | 0 | 100.00 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 20 | 13 | 60.61 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 34 | 0 | 100.00 |
| 2012 | 13 | 21 | 38.24 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 32 | 2 | 94.12 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 23 | 10 | 69.70 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 156 | 354 | 30.59 |