| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 0 | 17 | 0.00 |
| 2000 | 3 | 18 | 14.29 |
| 2001 | 15 | 13 | 53.57 |
| 2002 | 30 | 4 | 88.24 |
| 2003 | 0 | 39 | 0.00 |
| 2004 | 2 | 38 | 5.00 |
| 2005 | 5 | 36 | 12.20 |
| 2006 | 2 | 39 | 4.88 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| Totals | 57 | 372 | 13.29 |