1901-2000 Inches 1 3.21 2.47 0.74 106 23 1962 2006 2015 2006 top-third 1946 2 4.46 4.82 -0.36 51 78 2003 2006 2012 2015 normal 1958 3 5.51 5.98 -0.47 51 78 1980 1921 2012 2015 normal 1942 4 6.49 7.03 -0.54 54 75 2020 1921 2012 2015 normal 1948 5 7.47 7.78 -0.31 62 67 2020 1941 2014 2015 normal 6 7.55 8.51 -0.96 46 83 2011 1941 2013 2015 normal 7 7.82 9.15 -1.33 38 91 2011 1941 2013 2015 bottom-third 8 8.34 9.77 -1.43 36 93 2011 1941 2014 2015 bottom-third 9 9.39 10.50 -1.11 45 83 2011 1941 2014 2015 normal 10 10.24 11.16 -0.92 51 77 2011 1941 2014 2015 normal 11 13.13 12.29 0.84 87 41 2011 1941 2014 2015 top-third 12 14.23 13.99 0.24 77 51 2011 1941 2014 2015 normal 18 25.54 22.51 3.03 103 25 2012 1942 2014 2015 top-third 24 32.87 28.02 4.85 111 16 2012 1942 2015 1999 top-third 36 46.75 41.97 4.78 104 22 2013 1987 2015 2007 top-third 1932 48 56.94 55.94 1.00 75 50 1956 1987 2015 2010 normal 60 67.99 69.94 -1.95 52 72 1956 1988 2015 2010 normal 1980