| Year | Protected | Not Protected | Protected % |
| 2006 | 54 | -18 | 150.00 |
| 2004 | 95 | -51 | 215.91 |
| 2007 | 39 | -6 | 118.18 |
| 2008 | 14 | 20 | 41.18 |
| 1998 | 3 | 12 | 20.00 |
| 2001 | 0 | 33 | 0.00 |
| 2003 | 109 | -67 | 259.52 |
| 2002 | 0 | 38 | 0.00 |
| 2000 | 4 | 24 | 14.29 |
| 2005 | 55 | -10 | 122.22 |
| 1999 | 2 | 20 | 9.09 |
| Totals | 375 | -5 | 101.35 |