1901-2000 Inches 1 2.45 2.51 -0.06 61 69 1910 1973 1901 1906 normal 2 4.27 4.64 -0.37 36 94 1910 1998 1898 1906 bottom-third 3 7.02 6.96 0.06 73 57 1910 1998 1902 1906 normal 4 9.90 9.30 0.60 94 35 1981 1983,1998 1906 1903 top-third 5 12.39 11.53 0.86 99 30 1977 1983 1906 1903 top-third 6 14.47 13.70 0.77 92 37 1918 1983 1906 1903 top-third 7 17.38 16.19 1.19 98 31 1918 2019 1906 1903 top-third 8 20.77 18.82 1.95 110 19 1918 2019 1906 1903 top-third 9 24.07 21.60 2.47 114 15 1918 2019 1906 1903 top-third 10 27.11 24.53 2.58 114 15 1918 2019 1906 1903 top-third 1987 11 30.27 27.43 2.84 115 14 1918 2019 1906 1907 top-third 12 32.35 29.96 2.39 110 19 1918 2016 1905 1906 top-third 18 46.52 43.68 2.84 103 25 1918 2020 1906 1907 top-third 24 64.99 59.92 5.07 116 12 1955 2020 1906 1907 top-tenth 36 93.07 89.87 3.20 91 36 1955 2020 1906 1907 top-third 48 121.46 119.76 1.70 74 52 1957 2019 1906 1907 normal 60 153.49 149.62 3.87 85 40 1957 2020 1906 1907 top-third