First Generation 1958 Second Generation 1959 1960 Third Generation 1961 1962 1963 1964 Fourth Generation 1965 1966 1967 1968 1969 1970 Fifth Generation 1971 1972 1973 1974 1975 1976 Sixth Generation 1977 1978 1979 1980 1981 1982 1983 1984 1985 Seventh Generation 1994 1995 1996
