| Year | Protected | Not Protected | Protected % |
| 2006 | 31 | 5 | 86.11 |
| 2004 | 42 | 2 | 95.45 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 8 | 26 | 23.53 |
| 2007 | 25 | 8 | 75.76 |
| 2013 | 0 | 34 | 0.00 |
| 2008 | 27 | 7 | 79.41 |
| 2012 | 0 | 34 | 0.00 |
| 2001 | 0 | 33 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2003 | 32 | 10 | 76.19 |
| 2010 | 4 | 29 | 12.12 |
| 2002 | 38 | 0 | 100.00 |
| 2005 | 36 | 9 | 80.00 |
| Totals | 243 | 265 | 47.83 |