| Year | Protected | Not Protected | Protected % |
| 1998 | 0 | 10 | 0.00 |
| 1999 | 0 | 17 | 0.00 |
| 2000 | 16 | 5 | 76.19 |
| 2001 | 28 | 0 | 100.00 |
| 2002 | 9 | 25 | 26.47 |
| 2003 | 17 | 22 | 43.59 |
| 2004 | 1 | 39 | 2.50 |
| 2005 | 0 | 41 | 0.00 |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 0 | 32 | 0.00 |
| Totals | 71 | 326 | 17.88 |