1901-2000 Inches 1 2.45 2.35 0.10 69 60 1930 2015 2005 2009 normal 1952 2 4.67 4.58 0.09 69 60 1976 2015 2007 2009 normal 1967 3 6.64 6.74 -0.10 53 76 1917 2015 1999 2009 normal 4 9.42 9.23 0.19 66 63 1939 2018 2007 2009 normal 5 11.93 11.85 0.08 66 63 1917 2018 2007 2009 normal 6 15.25 14.62 0.63 82 47 1917 2018 2007 2009 normal 7 18.74 17.55 1.19 95 34 1917 2018 2008 2009 top-third 8 22.06 20.46 1.60 101 28 1917 2015 2008 2009 top-third 9 24.44 22.98 1.46 97 32 1956 2015 2008 2009 top-third 10 26.74 25.49 1.25 92 37 1956 2015 2008 2009 top-third 1968 11 28.75 27.62 1.13 85 44 1910 2018 2007 2009 normal 12 31.37 29.94 1.43 97 32 1910 1973 2008 2009 top-third 18 48.67 44.58 4.09 115 13 1954 2019 2009 1998 top-tenth 24 63.67 59.90 3.77 104 24 1931 2019 2009 2004 top-third 36 94.91 89.86 5.05 106 21 1956 2019 2009 1998 top-third 48 124.09 119.78 4.31 97 29 1956 2019 2009 1999 top-third 1947 60 153.91 149.68 4.23 90 35 1956 2019 2009 2000 top-third