| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 36 | 0.00 |
| 2004 | 13 | 31 | 29.55 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2001 | 0 | 33 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 26 | 16 | 61.90 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 1 | 37 | 2.63 |
| 2000 | 0 | 28 | 0.00 |
| 2005 | 7 | 38 | 15.56 |
| Totals | 47 | 421 | 10.04 |