Year % of value added in manufacturing 1964 45.13457556935818 1965 37.59177679882526 1966 25.573945541911375 1967 21.363431151241535 1968 17.823075917940674 1969 18.881772084334134 1970 19.874463588035614 1971 17.960015421049732 1972 22.914466737064416 1973 21.567761035747427 1974 23.95375346034848 1975 22.537697526531826 1976 22.068217830039195 1977 21.169122883909495 1978 28.861634743987686 1979 29.714989444053487 1980 43.04828388598022