| Year | Protected | Not Protected | Protected % |
| 2006 | 21 | 15 | 58.33 |
| 2004 | 44 | 0 | 100.00 |
| 2009 | 0 | 34 | 0.00 |
| 2007 | 15 | 18 | 45.45 |
| 2008 | 0 | 34 | 0.00 |
| 1998 | 15 | 0 | 100.00 |
| 2001 | 30 | 3 | 90.91 |
| 2003 | 40 | 2 | 95.24 |
| 2010 | 0 | 33 | 0.00 |
| 2002 | 38 | 0 | 100.00 |
| 2000 | 28 | 0 | 100.00 |
| 2005 | 29 | 16 | 64.44 |
| 1999 | 22 | 0 | 100.00 |
| Totals | 282 | 155 | 64.53 |