| Year | Protected | Not Protected | Protected % |
| 1998 | 2 | 8 | 20.00 |
| 1999 | 1 | 16 | 5.88 |
| 2000 | 21 | 0 | 100.00 |
| 2001 | 25 | 3 | 89.29 |
| 2002 | 24 | 10 | 70.59 |
| 2003 | 19 | 20 | 48.72 |
| 2004 | 19 | 21 | 47.50 |
| 2005 | 16 | 25 | 39.02 |
| 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 | 127 | 270 | 31.99 |