| Year | Protected | Not Protected | Protected % |
| 2006 | 16 | 20 | 44.44 |
| 2004 | 26 | 18 | 59.09 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 2 | 31 | 6.06 |
| 2013 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 0 | 42 | 0.00 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 0 | 38 | 0.00 |
| 2005 | 7 | 38 | 15.56 |
| Totals | 51 | 424 | 10.74 |