1961 - 1970 1962 1963 1964 1965 1966 1969

1971 - 1980 1971 1972 1973 1975 1978 1979

1981 - 1990 1981 1983 1984 1985 1986 1988 1989

1991 - 2000 1992 1993 1994 1995 1996 1997 1998 1999 2000

2001 - 2010 2001 2002 2008

2011 - ... 2011