| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 3 | 14 | 17.65 |
| 2000 | 21 | 0 | 100.00 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 27 | 7 | 79.41 |
| 2003 | 6 | 33 | 15.38 |
| 2004 | 2 | 38 | 5.00 |
| 2005 | 34 | 7 | 82.93 |
| 2006 | 2 | 39 | 4.88 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| 2011 | 0 | 32 | 0.00 |
| Totals | 123 | 306 | 28.67 |