| Year | Protected | Not Protected | Protected % |
| 1998 | 6 | 4 | 60.00 |
| 1999 | 5 | 12 | 29.41 |
| 2000 | 20 | 1 | 95.24 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 30 | 4 | 88.24 |
| 2003 | 1 | 38 | 2.56 |
| 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 | 90 | 307 | 22.67 |