| Year | Protected | Not Protected | Protected % |
| 2006 | 2 | 34 | 5.56 |
| 2004 | 1 | 43 | 2.27 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 1998 | 0 | 15 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2001 | 32 | 1 | 96.97 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 8 | 34 | 19.05 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 35 | 3 | 92.11 |
| 2000 | 13 | 15 | 46.43 |
| 2005 | 0 | 45 | 0.00 |
| 1999 | 0 | 22 | 0.00 |
| Totals | 91 | 414 | 18.02 |