1901-2000 Inches 1 5.98 3.47 2.51 125 4 1897 1926 1964 1945 top-tenth 2 9.98 7.14 2.84 120 9 1897 1926 1964 1934 top-tenth 3 14.15 11.14 3.01 117 12 1953 1926 1964 1958 top-tenth 4 18.00 15.39 2.61 109 20 1953 1915 1964 1958 top-third 5 20.73 19.66 1.07 74 55 1930 1915 1964 1961 normal 6 25.31 23.57 1.74 80 49 1930 2011 1964 1961 normal 7 29.30 27.38 1.92 83 46 1930 1945 1964 1961 normal 8 32.20 30.05 2.15 86 43 1930 1945 1964 1961 top-third 9 35.86 33.10 2.76 94 35 1930 1950 1964 1961 top-third 1912 10 39.21 36.19 3.02 91 37 1930 1950 1964 1958 top-third 11 42.21 39.33 2.88 92 36 1930 2019 1964 1958 top-third 12 43.23 42.25 0.98 64 64 1925 2019 1964 1961 normal 1932 18 65.65 65.79 -0.14 47 81 1931 2019 1964 1962 normal 24 80.95 84.47 -3.52 34 93 1941 2020 1964 1962 bottom-third 36 115.56 126.72 -11.16 11 115 1941 2020 1964 1963 bottom-tenth 48 158.08 168.99 -10.91 10 115 1956 2021 1956 1964 bottom-tenth 60 202.35 211.21 -8.86 18 106 1956 2020 1964 1962 bottom-third