| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 2 | 15 | 11.76 |
| 2000 | 14 | 7 | 66.67 |
| 2001 | 13 | 15 | 46.43 |
| 2002 | 3 | 31 | 8.82 |
| 2003 | 3 | 36 | 7.69 |
| 2004 | 1 | 39 | 2.50 |
| 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 | 36 | 361 | 9.07 |