| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 12 | 5 | 70.59 |
| 2000 | 9 | 12 | 42.86 |
| 2001 | 12 | 16 | 42.86 |
| 2002 | 34 | 0 | 100.00 |
| 2003 | 34 | 5 | 87.18 |
| 2004 | 16 | 24 | 40.00 |
| 2005 | 0 | 41 | 0.00 |
| 2006 | 17 | 24 | 41.46 |
| 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 | 134 | 328 | 29.00 |