| Year | Protected | Not Protected | Protected % |
| 1998 | 9 | 1 | 90.00 |
| 1999 | 9 | 8 | 52.94 |
| 2000 | 19 | 2 | 90.48 |
| 2001 | 20 | 8 | 71.43 |
| 2002 | 11 | 23 | 32.35 |
| 2003 | 0 | 39 | 0.00 |
| 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 | 68 | 329 | 17.13 |