| Year | Protected | Not Protected | Protected % |
| 1998-99 | 1 | 7 | 12.50 |
| 1999-00 | 4 | 6 | 40.00 |
| 2000-01 | 2 | 10 | 16.67 |
| 2001-02 | 7 | 7 | 50.00 |
| 2002-03 | 12 | 3 | 80.00 |
| 2003-04 | 0 | 16 | 0.00 |
| 2004-05 | 4 | 13 | 23.53 |
| 2006-07 | 1 | 1 | 50.00 |
| 2007-08 | 1 | 1 | 50.00 |
| 2010-11 | 1 | 1 | 50.00 |
| 2011-12 | 0 | 2 | 0.00 |
| 2012-13 | 0 | 2 | 0.00 |
| 2013-14 | 0 | 2 | 0.00 |
| 2014-15 | 0 | 2 | 0.00 |
| 2015-16 | 0 | 2 | 0.00 |
| Totals | 33 | 75 | 30.56 |