1901-2000 Inches 1 0.67 2.87 -2.20 2 127 1931 1948 1924 1923 bottom-tenth 2 2.07 5.60 -3.53 4 125 1939 1947 1917 1923 bottom-tenth 3 12.67 9.52 3.15 107 22 1931 2004 1923 1898 top-third 4 15.08 14.44 0.64 78 51 1931 1898 1923 1920 normal 5 20.98 20.04 0.94 78 51 1954 1898 1923 1920 normal 6 25.71 24.53 1.18 84 45 1954 1898 1923 1920 normal 7 29.26 28.24 1.02 81 48 1954 1898 1922 1923 normal 1911 8 35.03 32.05 2.98 94 35 1954 1898 1923 1920 top-third 9 38.88 37.11 1.77 86 43 1954 1928 1922 1923 top-third 10 42.69 41.61 1.08 77 52 1954 1929 1921 1923 normal 11 47.84 46.00 1.84 85 44 1954 1964 1923 1922 normal 12 51.60 50.09 1.51 74 54 1931 1964 1922 1923 normal 18 73.50 74.66 -1.16 56 72 1981 1929 1921 1923 normal 24 104.91 100.31 4.60 87 40 2007 1929 1923 1920 top-third 1993,2009 36 155.97 150.58 5.39 88 38 2008 1930 1923 1921 top-third 48 200.41 200.82 -0.41 62 63 2002 1949 1919 1923 normal 60 257.97 250.99 6.98 87 37 1954 1948 1922 1923 top-third