| Year | Protected | Not Protected | Protected % |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 15 | 16 | 48.39 |
| 2009 | 32 | 0 | 100.00 |
| 2010 | 30 | 2 | 93.75 |
| 2011 | 32 | 0 | 100.00 |
| 2012 | 33 | 0 | 100.00 |
| 2013 | 33 | 0 | 100.00 |
| 2014 | 33 | 1 | 97.06 |
| 2015 | 1 | 33 | 2.94 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 0 | 37 | 0.00 |
| Totals | 209 | 191 | 52.25 |