| Year | Protected | Not Protected | Protected % |
| 2006 | 11 | 25 | 30.56 |
| 2004 | 21 | 23 | 47.73 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 1998 | 15 | 0 | 100.00 |
| 2001 | 33 | 0 | 100.00 |
| 2003 | 33 | 9 | 78.57 |
| 2002 | 38 | 0 | 100.00 |
| 2000 | 28 | 0 | 100.00 |
| 2005 | 3 | 42 | 6.67 |
| 1999 | 22 | 0 | 100.00 |
| Totals | 204 | 200 | 50.50 |