1901-2000 Inches 1 2.22 5.01 -2.79 6 124 1947 1903 1947 1977 bottom-tenth 2 8.11 10.29 -2.18 31 99 1986 2020 1977 1975 bottom-third 3 11.07 15.87 -4.80 12 117 1981 1983 1963 1977 bottom-tenth 4 19.78 20.08 -0.30 63 66 1986 1983 1977 1975 normal 1969 5 24.03 23.04 0.99 78 51 1904 1983 1977 1975 normal 6 30.86 26.47 4.39 102 27 1904 1983 1977 1975 top-third 7 34.24 30.40 3.84 94 35 1904 1983 1977 1975 top-third 8 40.37 35.42 4.95 102 27 1904 1983 1977 1975 top-third 9 42.58 39.59 2.99 89 40 1904 1990 1977 1975 top-third 10 44.88 44.35 0.53 65 64 1904 1990 1977 1976 normal 11 51.79 49.67 2.12 78 51 1904 2020 1977 1976 normal 12 59.53 55.63 3.90 89 40 1904 1974 1977 1976 top-third 18 82.96 82.15 0.81 67 61 1955 2020 1977 1976 normal 24 110.45 111.27 -0.82 62 66 1964 1975 1971 1977 normal 36 174.70 166.93 7.77 85 42 1955 1976 1973 1977 top-third 48 239.74 222.41 17.33 96 30 1955 1976 1973 1977 top-third 60 317.46 277.73 39.73 121 4 1957 2022 1977 1976 top-tenth