1901-2000 Inches 1 2.67 4.59 -1.92 29 100 2008 1967 1968 1969 bottom-third 2 7.16 8.90 -1.74 47 82 1966 1919 1968 1969 normal 3 12.78 12.54 0.24 70 59 1966 2013 1968 1969 normal 4 15.23 16.10 -0.87 56 73 1964 1919 1968 1969 normal 5 20.06 19.58 0.48 71 58 1957 1919 1968 1969 normal 6 24.06 23.55 0.51 74 55 1930 1989 1968 1969 normal 7 26.48 26.60 -0.12 62 67 1930 1958 1968 1969 normal 8 28.17 30.09 -1.92 52 77 1930 1958 1968 1969 normal 9 35.72 33.55 2.17 83 45 1930 1958 1969 1967 normal 10 37.97 36.62 1.35 71 57 1977 1958 1969 1967 normal 11 39.30 39.77 -0.47 58 70 1966 1958 1968 1969 normal 2007 12 42.76 43.36 -0.60 62 66 1966 1958 1969 1967 normal 18 68.37 66.82 1.55 72 56 1966 1984 1969 1961 normal 24 84.14 86.56 -2.42 49 78 1966 2004 1969 1968 normal 36 118.24 129.84 -11.60 16 110 1966 2005 1968 1969 bottom-third 48 169.40 173.06 -3.66 46 79 1966 1939 1969 1961 normal 60 197.85 216.24 -18.39 9 115 1966 1937 1969 1964 bottom-tenth