| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 36 | 0.00 |
| 2004 | 5 | 39 | 11.36 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 1998 | 0 | 15 | 0.00 |
| 2001 | 6 | 27 | 18.18 |
| 2003 | 25 | 17 | 59.52 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 37 | 1 | 97.37 |
| 2000 | 0 | 28 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| 1999 | 0 | 22 | 0.00 |
| Totals | 73 | 364 | 16.70 |