- 1986 1 ( 1 )
- 1987 1 ( 2 3 4 )
- 1988 2 ( 2 3 )
- 1989 ( Supplement ) 3 ( 2 3 )
- 1990 4 ( 3 )
- 1991 ( Supplement ) 5 ( 1 2 3 )
- 1992 6 ( 1 2 3 )
- 1993 ( Supplement ) 7 ( 1 2 3 )
- 1994 ( Supplement ) 8 ( 1 2 )
- 1995 9 ( 1 2 )
- 1996 10 ( 1 2 )
- 1997 11 ( 1 2 )
- 1998 12 ( 1 )
- 1999 13 ( 1 2 )
- 2000 14 ( 1 2 3 )
- 2001 15 ( 1 2 )
- 2002 16 ( 1 )
- 2003 17 ( 1 2 3 )
- 2004 18 ( 2 )
