| Year | Protected | Not Protected | Protected % |
| 1998 | 5 | 5 | 50.00 |
| 1999 | 11 | 6 | 64.71 |
| 2000 | 21 | 0 | 100.00 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 29 | 5 | 85.29 |
| 2003 | 21 | 18 | 53.85 |
| 2004 | 6 | 34 | 15.00 |
| 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 |
| Totals | 121 | 244 | 33.15 |