| Year | Protected | Not Protected | Protected % |
| 1998 | 8 | 2 | 80.00 |
| 1999 | 4 | 13 | 23.53 |
| 2000 | 9 | 12 | 42.86 |
| 2001 | 0 | 28 | 0.00 |
| 2002 | 5 | 29 | 14.71 |
| 2003 | 0 | 39 | 0.00 |
| 2004 | 1 | 39 | 2.50 |
| 2005 | 0 | 41 | 0.00 |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| Totals | 27 | 370 | 6.80 |