| Year | Protected | Not Protected | Protected % |
| 2006 | 7 | 29 | 19.44 |
| 2004 | 24 | 20 | 54.55 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 1998 | 0 | 15 | 0.00 |
| 2001 | 19 | 14 | 57.58 |
| 2003 | 7 | 35 | 16.67 |
| 2002 | 27 | 11 | 71.05 |
| 2000 | 24 | 4 | 85.71 |
| 2005 | 11 | 34 | 24.44 |
| 1999 | 3 | 19 | 13.64 |
| Totals | 122 | 282 | 30.20 |