| Year | Protected | Not Protected | Protected % |
| 1998 | 3 | 7 | 30.00 |
| 1999 | 0 | 17 | 0.00 |
| 2000 | 0 | 21 | 0.00 |
| 2001 | 4 | 24 | 14.29 |
| 2002 | 15 | 19 | 44.12 |
| 2003 | 7 | 32 | 17.95 |
| 2004 | 4 | 36 | 10.00 |
| 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 | 33 | 364 | 8.31 |