1901-2000 Inches 1 0.41 0.91 -0.50 16 114 1959 1978 1966 1971 bottom-third 1934 2 0.74 1.98 -1.24 4 126 1959 1978 1966 1971 bottom-tenth 3 1.16 3.09 -1.93 2 128 1977 1978 1972 1971 bottom-tenth 4 1.56 4.25 -2.69 3 127 1966 1978 1966 1971 bottom-tenth 5 3.49 5.27 -1.78 12 117 1977 1978 1966 1971 bottom-tenth 2007,2015 6 4.39 6.15 -1.76 15 114 1977 1978 1959 1971 bottom-third 7 5.09 6.92 -1.83 19 110 1977 2005 1968 1971 bottom-third 8 5.43 7.49 -2.06 14 115 1959 1983 1959 1971 bottom-third 9 6.14 8.09 -1.95 17 112 2021 1983 1963 1971 bottom-third 10 6.58 8.63 -2.05 17 112 2021 1983 1963 1971 bottom-third 11 7.28 9.32 -2.04 25 104 2021 1983 1963 1971 bottom-third 12 9.70 10.30 -0.60 58 71 2021 1978 1970 1971 normal 18 15.65 16.45 -0.80 52 76 1934 1984 1967 1971 normal 24 20.19 20.60 -0.41 63 65 1930 1984 1971 1970 normal 36 29.84 30.88 -1.04 52 75 1955 1985 1965 1971 normal 48 42.62 41.11 1.51 83 43 1931 1986 1970 1971 normal 60 52.85 51.36 1.49 85 40 1957 1986 1971 1969 top-third