1951 - 1960 1960

1961 - 1970 1961 1962 1964 1965 1967 1970

1971 - 1980 1971 1972 1973 1974 1975 1976 1977 1978 1980

1981 - 1990 1981 1982 1983 1984 1985 1987 1990

1991 - 2000 1991 1992 1993 1994 1996 1997 1999

2001 - 2010 2001 2002 2003 2006

2011 - .... 2014