1966	1967a	1967b	1968a	1968b
1968c	1969*	1970a	1970b	1972a
1972b	1972c**	1973	1974	1975a**
1975b	1975c	1976	1977a	1977b**
1979	1982	1985	1986**	1989a*
1989b	1995	1999*	2001**	2002
2004a	2004b	2008a*	2008b	2013
2018a	2018b