| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 16 | 1 | 94.12 |
| 2000 | 8 | 13 | 38.10 |
| 2001 | 10 | 18 | 35.71 |
| 2002 | 9 | 25 | 26.47 |
| 2003 | 8 | 31 | 20.51 |
| 2004 | 7 | 33 | 17.50 |
| 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 |
| Totals | 58 | 339 | 14.61 |