1964 55.0 1961 56.6 1956 54.0 1982 54.4 1985 55.6 1987 55.0 1985 56.0 1970 57.2 1954 52.2 1983 52.8 1971 58.0 1955 52.6 1949 53.2 1979 54.0 1986 55.0 1956 53.6 1972 57.0 1976 53.2 1970 55.6 1955 54.2 1961 57.0 1957 53.6 1960 57.0 1952 53.4 1965 56.6 1977 54.0 1988 54.0 1947 53.0 1959 56.8 1980 53.6 1964 56.0 1979 53.0 1971 55.8 1984 55.2 1962 54.6 1953 50.6 1951 53.4 1989 56.2 1978 53.0 1983 52.6 1948 53.6 1965 58.2 1974 59.0 1949 51.6 1966 57.2 1963 58.0 1980 53.0 1967 57.6 1989 54.0 1974 54.0 1951 54.0 1975 54.0 1969 58.0 1969 56.0 1988 55.6 1946 53.2 1958 53.2 1968 57.2 1967 55.8 1963 56.2 1966 56.0 1950 53.4 1975 54.2 1977 53.2 1950 51.0 1982 54.6 1986 53.2 1957 55.0 1953 54.8 1981 54.8 1945 51.8 1948 52.2 1947 53.0 1946 54.2 1984 54.0 1972 57.0 1976 53.2 1978 53.6 1952 54.6 1987 54.0 1968 56.0 1958 53.2 1960 55.2 1973 59.0 1959 57.2 1962 56.0 1981 54.0 1954 54.6 1945 54.6 1973 57.6