1901-2000 Inches 1 1.91 1.14 0.77 119 11 1981 1969 1931 1929 top-tenth 1907 2 3.30 2.39 0.91 111 18 1961 1969 1931 1916 top-third 3 7.37 4.22 3.15 127 2 2003 2016 1931 1932 top-tenth 4 10.20 6.52 3.68 127 2 1977 2020 1931 1932 top-tenth 5 14.98 9.90 5.08 127 2 1977 2020 1931 1932 top-tenth 6 17.65 13.46 4.19 120 9 1977 2020 1931 1932 top-tenth 7 19.88 17.05 2.83 105 24 1977 2020 1931 1929 top-third 8 23.91 21.07 2.84 105 24 1977 2011 1931 1929 top-third 9 26.43 24.46 1.97 86 43 1977 2020 1931 1929 top-third 10 27.81 26.96 0.85 73 56 1977 2020 1931 1929 normal 11 29.36 28.68 0.68 69 60 1911 2020 1931 1929 normal 12 29.87 29.70 0.17 63 66 1911 2020 1931 1929 normal 18 38.97 43.18 -4.21 18 110 1911 2020 1931 1930 bottom-third 24 53.34 59.40 -6.06 13 115 1931 2020 1931 1930 bottom-tenth 36 79.02 89.04 -10.02 4 123 1935 2020 1913 1931 bottom-tenth 48 111.87 118.69 -6.82 18 108 1937 2020 1931 1930 bottom-third 60 140.44 148.35 -7.91 21 104 1934 2020 1928 1931 bottom-third