| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 0 | 17 | 0.00 |
| 2000 | 3 | 18 | 14.29 |
| 2001 | 26 | 2 | 92.86 |
| 2002 | 24 | 10 | 70.59 |
| 2003 | 2 | 37 | 5.13 |
| 2004 | 19 | 21 | 47.50 |
| 2005 | 13 | 28 | 31.71 |
| 2006 | 4 | 37 | 9.76 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| Totals | 91 | 338 | 21.21 |