| Year | Protected | Not Protected | Protected % |
| 2006 | 4 | 32 | 11.11 |
| 2004 | 44 | 0 | 100.00 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 1 | 32 | 3.03 |
| 2013 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2001 | 0 | 33 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 34 | 8 | 80.95 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 37 | 1 | 97.37 |
| 2005 | 40 | 5 | 88.89 |
| Totals | 160 | 314 | 33.76 |