| Year | Protected | Not Protected | Protected % |
| 2003 | 0 | 39 | 0.00 |
| 2004 | 26 | 14 | 65.00 |
| 2005 | 40 | 1 | 97.56 |
| 2006 | 35 | 6 | 85.37 |
| 2007 | 30 | 1 | 96.77 |
| 2008 | 19 | 12 | 61.29 |
| 2009 | 4 | 28 | 12.50 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 0 | 34 | 0.00 |
| Totals | 154 | 299 | 34.00 |