| Year | Protected | Not Protected | Protected % |
| 2006 | 8 | 28 | 22.22 |
| 2004 | 0 | 44 | 0.00 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 2 | 31 | 6.06 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 0 | 34 | 0.00 |
| 2001 | 32 | 1 | 96.97 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 2 | 40 | 4.76 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 17 | 21 | 44.74 |
| 2000 | 0 | 28 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| Totals | 61 | 407 | 13.03 |