1901-2000 Inches 1 3.17 3.09 0.08 72 57 1925 2004 1941 1943 normal 1930,1975 2 5.31 5.68 -0.37 43 86 1925 2011 1941 1943 bottom-third 1917,2007 3 7.95 7.73 0.22 70 59 1958 2011 1941 1943 normal 4 9.43 9.23 0.20 68 61 1958 2011 1941 1943 normal 5 10.52 11.04 -0.52 46 83 1958 2013 1941 1943 normal 6 11.19 13.03 -1.84 18 110 1958 2013 1941 1943 bottom-third 7 14.05 15.60 -1.55 30 98 1987 2004 1940 1943 bottom-third 8 15.98 18.31 -2.33 17 111 1925 2020 1940 1943 bottom-third 9 18.23 21.69 -3.46 12 116 1925 2020 1940 1943 bottom-tenth 10 20.96 24.82 -3.86 12 116 1931 2020 1934 1943 bottom-tenth 11 23.72 27.88 -4.16 12 116 1931 2017 1940 1943 bottom-tenth 12 28.63 31.14 -2.51 27 101 1931 2020 1940 1943 bottom-third 18 44.83 44.16 0.67 61 66 1931 2020 1941 1943 normal 24 65.08 62.26 2.82 79 48 1931 2020 1941 1943 normal 2005 36 100.02 93.40 6.62 97 29 1936 2020 1942 1943 top-third 48 130.42 124.54 5.88 83 42 1937 2020 1943 1929 normal 60 158.99 155.69 3.30 63 61 1934 2020 1942 1943 normal