1901-2000 Inches 1 2.12 2.51 -0.39 22 108 1910 1973 1956 1959 bottom-third 2 4.71 4.64 0.07 72 58 1910 1998 1959 1958 normal 3 6.97 6.96 0.01 72 58 1910 1998 1959 1958 normal 1989 4 9.19 9.30 -0.11 61 68 1981 1983,1998 1959 1958 normal 5 10.91 11.53 -0.62 42 87 1977 1983 1959 1958 bottom-third 6 14.41 13.70 0.71 90 39 1918 1983 1959 1958 top-third 7 17.23 16.19 1.04 96 33 1918 2019 1959 1958 top-third 8 19.99 18.82 1.17 96 33 1918 2019 1959 1958 top-third 9 22.93 21.60 1.33 98 31 1918 2019 1959 1958 top-third 10 25.55 24.53 1.02 91 38 1918 2019 1959 1958 top-third 11 28.75 27.43 1.32 93 36 1918 2019 1959 1958 top-third 12 30.89 29.96 0.93 80 49 1918 2016 1959 1958 normal 18 42.63 43.68 -1.05 42 86 1918 2020 1957 1959 bottom-third 24 60.42 59.92 0.50 71 57 1955 2020 1958 1959 normal 1904 36 94.95 89.87 5.08 107 20 1955 2020 1959 1908 top-third 48 120.34 119.76 0.58 61 65 1957 2019 1959 1952 normal 60 148.90 149.62 -0.72 56 69 1957 2020 1959 1953 normal