1901-2000 Inches 1 2.46 2.52 -0.06 57 73 1987 1957 2012 2017 normal 1968 2 4.94 5.03 -0.09 63 67 1910 1973 2013 2017 normal 3 7.83 7.16 0.67 102 28 1910 1983 2015 2017 top-third 2020 4 9.68 9.48 0.20 79 51 1910 1998 2015 2017 normal 5 11.27 11.82 -0.55 39 90 1931 1983 2015 2017 bottom-third 2006 6 12.89 14.05 -1.16 22 107 1977 1983 2000 2017 bottom-third 1910 7 15.49 16.22 -0.73 39 90 1981 1983 2014 2017 bottom-third 1951 8 17.76 18.71 -0.95 36 93 1918 2019 2002 2017 bottom-third 9 21.18 21.33 -0.15 56 73 1918 2019 2014 2017 normal 10 23.98 24.12 -0.14 54 75 1931 2019 2013 2017 normal 11 27.05 27.04 0.01 55 74 1931 2019 2013 2017 normal 12 30.41 29.95 0.46 70 59 1918 2019 2013 2017 normal 1909 18 46.46 44.02 2.44 102 26 1931 2020 2015 2017 top-third 24 63.52 59.92 3.60 107 21 1955 2020 2015 2017 top-third 36 99.47 89.88 9.59 119 8 1955 2020 2016 2017 top-tenth 48 129.98 119.77 10.21 117 9 1956 2019 2016 2017 top-tenth 60 160.90 149.63 11.27 118 7 1957 2020 2017 1999 top-tenth