| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 1 | 16 | 5.88 |
| 2000 | 2 | 19 | 9.52 |
| 2001 | 23 | 5 | 82.14 |
| 2002 | 2 | 32 | 5.88 |
| 2003 | 0 | 39 | 0.00 |
| 2004 | 0 | 40 | 0.00 |
| 2005 | 0 | 41 | 0.00 |
| 2006 | 2 | 39 | 4.88 |
| 2007 | 4 | 27 | 12.90 |
| 2008 | 7 | 24 | 22.58 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| Totals | 41 | 388 | 9.56 |