1949 1954 1956 1959 1964 1965 1967 1968 1969 1970 1971 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 2000 2002