1972 1974a 1974b 1976a 1976b
1976c 1977 1978 1980a 1980b
1983a 1983b 1984 1986a 1986b
1987 1988 1989 1993a 1993b
1994a 1994b 1996 1997 1998a
1998b 2001a 2001b 2003 2004a
2004b 2005a 2005b 2005c 2006
2007 2009a 2009b 2011a 2011b
2011c 2013a 2013b 2013c 2015