| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 0 | 17 | 0.00 |
| 2000 | 6 | 15 | 28.57 |
| 2001 | 24 | 4 | 85.71 |
| 2002 | 27 | 7 | 79.41 |
| 2003 | 32 | 7 | 82.05 |
| 2004 | 40 | 0 | 100.00 |
| 2005 | 23 | 18 | 56.10 |
| 2006 | 4 | 37 | 9.76 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| Totals | 156 | 241 | 39.29 |