1901-2000 Inches 1 2.21 2.31 -0.10 59 71 1981 1916 1919 1918 normal 1962,2008 2 4.02 4.66 -0.64 25 104 1981 1932 1904 1919 bottom-third 1926 3 6.82 6.89 -0.07 66 63 1977 2016 1918 1919 normal 2012 4 10.27 9.06 1.21 104 25 1981 2016 1919 1916 top-third 5 12.61 11.55 1.06 95 34 1940 2019 1919 1916 top-third 6 15.09 14.17 0.92 91 38 1940 2019 1919 1916 top-third 7 18.13 16.96 1.17 97 32 1940 2019 1919 1916 top-third 8 21.10 19.88 1.22 99 30 1981 2019 1919 1916 top-third 9 24.30 22.79 1.51 100 29 1918 2016 1919 1916 top-third 10 26.71 25.32 1.39 98 31 1940 2016 1919 1916 top-third 11 29.42 27.83 1.59 97 32 1957 1974 1919 1916 top-third 12 32.06 29.96 2.10 104 25 1931 1974 1919 1916 top-third 18 46.78 44.14 2.64 96 32 1955 2020 1919 1916 top-third 24 60.34 59.93 0.41 66 62 1918 2020 1919 1917 normal 36 85.91 89.86 -3.95 22 105 1957 2020 1919 1918 bottom-third 48 113.73 119.76 -6.03 13 113 1957 2020 1920 1919 bottom-tenth 60 147.54 149.63 -2.09 46 79 1957 2020 1919 1917 normal