| Year | Protected | Not Protected | Protected % |
| 2000 | 15 | 6 | 71.43 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 31 | 3 | 91.18 |
| 2003 | 39 | 0 | 100.00 |
| 2004 | 28 | 12 | 70.00 |
| 2005 | 25 | 16 | 60.98 |
| 2006 | 33 | 8 | 80.49 |
| 2007 | 14 | 17 | 45.16 |
| 2008 | 7 | 24 | 22.58 |
| 2009 | 13 | 19 | 40.63 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| Totals | 233 | 269 | 46.41 |