| Year | Protected | Not Protected | Protected % |
| 1998-99 | 0 | 8 | 0.00 |
| 1999-00 | 7 | 3 | 70.00 |
| 2000-01 | 0 | 12 | 0.00 |
| 2001-02 | 0 | 14 | 0.00 |
| 2002-03 | 1 | 14 | 6.67 |
| 2003-04 | 6 | 10 | 37.50 |
| 2004-05 | 9 | 8 | 52.94 |
| 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 | 23 | 81 | 22.12 |