1973 1983 1986 1988 1989a
1989b 1990b 1992 1993a 1993b
1993c 1994 1995 1997 1998a
1998b 2000a 2000b 2002a 2002b
2004 2005 2006 2007 2008
2008b 2010 2012 2015 2016