| Year | Protected | Not Protected | Protected % |
| 1998 | 7 | 3 | 70.00 |
| 1999 | 10 | 7 | 58.82 |
| 2000 | 2 | 19 | 9.52 |
| 2001 | 0 | 28 | 0.00 |
| 2002 | 0 | 34 | 0.00 |
| 2003 | 0 | 39 | 0.00 |
| 2004 | 0 | 40 | 0.00 |
| 2005 | 13 | 28 | 31.71 |
| 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 | 32 | 365 | 8.06 |