| Year | Protected | Not Protected | Protected % |
| 1998 | 7 | 3 | 70.00 |
| 1999 | 6 | 11 | 35.29 |
| 2000 | 1 | 20 | 4.76 |
| 2001 | 7 | 21 | 25.00 |
| 2002 | 30 | 4 | 88.24 |
| 2003 | 36 | 3 | 92.31 |
| 2004 | 12 | 28 | 30.00 |
| 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 | 99 | 298 | 24.94 |