| Year | Protected | Not Protected | Protected % |
| 1998 | 10 | 0 | 100.00 |
| 1999 | 17 | 0 | 100.00 |
| 2000 | 21 | 0 | 100.00 |
| 2001 | 27 | 1 | 96.43 |
| 2002 | 22 | 12 | 64.71 |
| 2003 | 1 | 38 | 2.56 |
| 2004 | 40 | 0 | 100.00 |
| 2005 | 36 | 5 | 87.80 |
| 2006 | 18 | 23 | 43.90 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| Totals | 192 | 173 | 52.60 |