| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 36 | 0.00 |
| 2004 | 18 | 26 | 40.91 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 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 | 36 | 6 | 85.71 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 32 | 6 | 84.21 |
| 2005 | 4 | 41 | 8.89 |
| Totals | 90 | 418 | 17.72 |