1901-2000 Inches 1 2.60 2.78 -0.18 32 97 1930 1950,1958 2012 2013 bottom-third 1932,2002 2 6.27 5.70 0.57 103 26 1930 1928 2012 2013 top-third 3 9.08 8.62 0.46 85 44 1988 2015 2012 2013 normal 4 11.96 11.13 0.83 97 32 1934 2015 2012 2013 top-third 1900 5 14.33 13.64 0.69 83 46 1936 1973 2012 2013 normal 1919 6 16.58 15.78 0.80 84 45 1934 2019 2012 2013 normal 7 17.95 18.09 -0.14 56 73 1934 2019 2012 2013 normal 8 20.16 20.44 -0.28 51 77 1931 2019 2012 2013 normal 9 22.20 22.66 -0.46 48 80 1934 2019 2012 2013 normal 10 24.43 24.83 -0.40 48 80 1934 2019 2012 2013 normal 11 27.41 27.33 0.08 59 69 1934 2019 2012 2013 normal 12 29.97 29.95 0.02 54 74 1918 2019 2012 2013 normal 1937 18 46.64 45.74 0.90 73 55 1931 2019 2013 2011 normal 24 60.25 59.92 0.33 60 67 1918 2020 2013 2011 normal 36 88.23 89.88 -1.65 43 83 1956 2019 2003 2013 normal 48 118.57 119.78 -1.21 47 78 1956 2019 2004 2013 normal 1991 60 152.24 149.64 2.60 75 49 1934 2019 2006 2013 normal