| 1st Grade | 2nd Grade | 3rd Grade | 4th Grade | |||
| 1991/1992 | 1988/1989 | 1988/1989 | ||||
| 1993/1994 | 1994/1995 | 1998/1999 | ||||
| 1994/1995 | 1996/1997 | 2002/2003 | ||||
| 1995/1996 | 1997/1998 | 2005/2006 | ||||
| 1996/1997 | 2003/2004 | 2006/2007 | ||||
| 1997/1998 | 2009/2010 | 2007/2008 | ||||
| 1998/1999 | 2008/2009 | |||||
| 1999/2000 | 2009/2010 | |||||
| 2000/2001 | 2010/2011 | |||||
| 2004/2005 |
