| Year | Protected | Not Protected | Protected % |
| 2006 | 13 | 23 | 36.11 |
| 2004 | 0 | 44 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 0 | 34 | 0.00 |
| 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 | 0 | 42 | 0.00 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 0 | 38 | 0.00 |
| 2000 | 0 | 28 | 0.00 |
| 2005 | 4 | 41 | 8.89 |
| Totals | 17 | 519 | 3.17 |