| Year | Protected | Not Protected | Protected % |
| 1998-99 | 0 | 8 | 0.00 |
| 1999-00 | 3 | 7 | 30.00 |
| 2000-01 | 0 | 12 | 0.00 |
| 2001-02 | 5 | 9 | 35.71 |
| 2002-03 | 2 | 13 | 13.33 |
| 2003-04 | 0 | 16 | 0.00 |
| 2004-05 | 0 | 17 | 0.00 |
| 2006-07 | 0 | 2 | 0.00 |
| 2007-08 | 0 | 2 | 0.00 |
| 2010-11 | 0 | 2 | 0.00 |
| 2011-12 | 0 | 2 | 0.00 |
| 2012-13 | 0 | 2 | 0.00 |
| 2013-14 | 0 | 2 | 0.00 |
| Totals | 10 | 94 | 9.62 |