| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2006 | 0 | 36 | 0.00 |
| 2014 | 3 | 31 | 8.82 |
| 2009 | 27 | 7 | 79.41 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 12 | 22 | 35.29 |
| 2012 | 21 | 13 | 61.76 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 31 | 3 | 91.18 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 25 | 8 | 75.76 |
| 2017 | 0 | 34 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| Totals | 119 | 436 | 21.44 |