Year LCU per US$, period average 1960 0.999999999 1961 0.999999999 1962 0.999999999 1963 0.999999999 1964 0.999999999 1965 0.999999999 1966 0.999999999 1967 0.999999999 1968 0.999999999 1969 0.999999999 1970 0.999999999 1971 0.999999999 1972 0.920999999 1973 0.836666665666667 1974 0.821999999