| Year | Protected | Not Protected | Protected % |
| 2002 | 11 | 23 | 32.35 |
| 2003 | 2 | 37 | 5.13 |
| 2004 | 10 | 30 | 25.00 |
| 2005 | 6 | 35 | 14.63 |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 0 | 34 | 0.00 |
| Totals | 29 | 458 | 5.95 |