| Year | Protected | Not Protected | Protected % |
| 1998 | 10 | 0 | 100.00 |
| 1999 | 9 | 8 | 52.94 |
| 2000 | 3 | 18 | 14.29 |
| 2001 | 6 | 22 | 21.43 |
| 2002 | 27 | 7 | 79.41 |
| 2003 | 9 | 30 | 23.08 |
| 2004 | 2 | 38 | 5.00 |
| 2005 | 1 | 40 | 2.44 |
| 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 |
| Totals | 67 | 362 | 15.62 |