| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 7 | 10 | 41.18 |
| 2000 | 14 | 7 | 66.67 |
| 2001 | 16 | 12 | 57.14 |
| 2002 | 16 | 18 | 47.06 |
| 2003 | 4 | 35 | 10.26 |
| 2004 | 0 | 40 | 0.00 |
| 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 | 57 | 340 | 14.36 |