| Year | Protected | Not Protected | Protected % |
| 1998 | 1 | 9 | 10.00 |
| 1999 | 16 | 1 | 94.12 |
| 2000 | 21 | 0 | 100.00 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 34 | 0 | 100.00 |
| 2003 | 39 | 0 | 100.00 |
| 2004 | 37 | 3 | 92.50 |
| 2005 | 26 | 15 | 63.41 |
| 2006 | 3 | 38 | 7.32 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| Totals | 205 | 192 | 51.64 |