1901-2000 Inches 1 2.54 2.49 0.05 75 54 1956 1986 2007 2008 normal 1964,1997 2 5.23 5.11 0.12 79 50 1956 1977 2007 2008 normal 1992,2019 3 8.30 7.88 0.42 90 39 1930 1915 2007 2008 top-third 4 11.31 10.81 0.50 87 42 1930 1915 2007 2008 top-third 2015 5 14.62 13.72 0.90 95 34 1956 1915 2008 2004 top-third 6 17.45 16.24 1.21 98 31 1956 1915 2008 2004 top-third 7 20.15 18.75 1.40 102 27 1956 1973 2008 2004 top-third 8 21.70 20.88 0.82 82 47 1930 2019 2007 2008 normal 9 23.30 23.20 0.10 64 65 1934 2019 2007 2008 normal 10 26.14 25.54 0.60 78 50 1931 2019 2007 2008 normal 11 28.09 27.77 0.32 68 60 1934 2019 2007 2008 normal 12 30.27 29.94 0.33 68 60 1934 2019 2007 2008 normal 18 47.34 46.20 1.14 79 49 1931 2019 2008 2005 normal 24 61.63 59.92 1.71 81 46 1918 2020 2008 2005 normal 36 91.65 89.87 1.78 80 46 1956 2019 2008 2006 normal 48 120.42 119.78 0.64 64 61 1956 2019 2004 2008 normal 60 152.02 149.66 2.36 75 49 1956 2020 2006 2008 normal