| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 2 | 15 | 11.76 |
| 2000 | 20 | 1 | 95.24 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 34 | 0 | 100.00 |
| 2003 | 37 | 2 | 94.87 |
| 2004 | 25 | 15 | 62.50 |
| 2005 | 40 | 1 | 97.56 |
| 2006 | 20 | 21 | 48.78 |
| 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 | 206 | 223 | 48.02 |