| Year | Protected | Not Protected | Protected % |
| 2006 | 33 | 3 | 91.67 |
| 2004 | 44 | 0 | 100.00 |
| 2009 | 33 | 1 | 97.06 |
| 2007 | 33 | 0 | 100.00 |
| 2013 | 0 | 34 | 0.00 |
| 2008 | 34 | 0 | 100.00 |
| 2012 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 42 | 0 | 100.00 |
| 2010 | 30 | 3 | 90.91 |
| 2002 | 0 | 38 | 0.00 |
| 2005 | 43 | 2 | 95.56 |
| Totals | 292 | 149 | 66.21 |