| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 14 | 3 | 82.35 |
| 2000 | 7 | 14 | 33.33 |
| 2001 | 6 | 22 | 21.43 |
| 2002 | 0 | 34 | 0.00 |
| 2003 | 1 | 38 | 2.56 |
| 2004 | 0 | 40 | 0.00 |
| 2005 | 3 | 38 | 7.32 |
| 2006 | 4 | 37 | 9.76 |
| 2007 | 6 | 25 | 19.35 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| Totals | 41 | 388 | 9.56 |