| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 36 | 0.00 |
| 2004 | 1 | 43 | 2.27 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 1998 | 8 | 7 | 53.33 |
| 2012 | 10 | 24 | 29.41 |
| 2001 | 26 | 7 | 78.79 |
| 2011 | 5 | 29 | 14.71 |
| 2003 | 0 | 42 | 0.00 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 18 | 20 | 47.37 |
| 2000 | 28 | 0 | 100.00 |
| 2005 | 0 | 45 | 0.00 |
| 1999 | 25 | -3 | 113.64 |
| Totals | 121 | 384 | 23.96 |