| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 0 | 17 | 0.00 |
| 2000 | 0 | 21 | 0.00 |
| 2001 | 1 | 27 | 3.57 |
| 2002 | 8 | 26 | 23.53 |
| 2003 | 23 | 16 | 58.97 |
| 2004 | 3 | 37 | 7.50 |
| 2005 | 8 | 33 | 19.51 |
| 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 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| Totals | 43 | 419 | 9.31 |