| Year | Protected | Not Protected | Protected % |
| 1998 | 10 | 0 | 100.00 |
| 1999 | 17 | 0 | 100.00 |
| 2000 | 13 | 8 | 61.90 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 28 | 6 | 82.35 |
| 2003 | 11 | 28 | 28.21 |
| 2004 | 3 | 37 | 7.50 |
| 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 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| Totals | 110 | 352 | 23.81 |