| Year | Protected | Not Protected | Protected % |
| 1998 | 8 | 2 | 80.00 |
| 1999 | 14 | 3 | 82.35 |
| 2000 | 12 | 9 | 57.14 |
| 2001 | 8 | 20 | 28.57 |
| 2002 | 4 | 30 | 11.76 |
| 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 | 46 | 351 | 11.59 |