| Year | Protected | Not Protected | Protected % |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 3 | 29 | 9.38 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 8 | 25 | 24.24 |
| 2013 | 14 | 19 | 42.42 |
| 2014 | 2 | 32 | 5.88 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 0 | 37 | 0.00 |
| 2019 | 0 | 38 | 0.00 |
| Totals | 27 | 411 | 6.16 |