| Year | Protected | Not Protected | Protected % |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 1 | 30 | 3.23 |
| 2009 | 3 | 29 | 9.38 |
| 2010 | 15 | 17 | 46.88 |
| 2011 | 32 | 0 | 100.00 |
| 2012 | 15 | 18 | 45.45 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 3 | 31 | 8.82 |
| 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 |
| 2020 | 0 | 39 | 0.00 |
| Totals | 69 | 408 | 14.47 |