| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 36 | 0.00 |
| 2004 | 28 | 16 | 63.64 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 6 | 28 | 17.65 |
| 2007 | 0 | 33 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2001 | 0 | 33 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 10 | 32 | 23.81 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 7 | 31 | 18.42 |
| 2005 | 3 | 42 | 6.67 |
| Totals | 54 | 454 | 10.63 |