| Year | Protected | Not Protected | Protected % |
| 1998 | 10 | 0 | 100.00 |
| 1999 | 17 | 0 | 100.00 |
| 2000 | 21 | 0 | 100.00 |
| 2001 | 26 | 2 | 92.86 |
| 2002 | 7 | 27 | 20.59 |
| 2003 | 17 | 22 | 43.59 |
| 2004 | 3 | 37 | 7.50 |
| 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 |
| Totals | 101 | 264 | 27.67 |