1901-2000 Inches 1 1.00 3.30 -2.30 4 126 1970 1979 1970 1984 bottom-tenth 2 4.26 6.80 -2.54 9 120 1944 1958 1981 1984 bottom-tenth 3 7.02 10.72 -3.70 3 126 1940 1984 1940 1984 bottom-tenth 4 9.38 14.43 -5.05 4 125 1948 2006 1948 1984 bottom-tenth 5 10.97 18.13 -7.16 1 128 1985 2006 1985 1984 lowest 6 13.23 21.63 -8.40 1 128 1948,1985 2006 1948 1984 lowest 1948 7 17.60 25.41 -7.81 1 128 1985 2006 1985 1984 lowest 8 23.73 29.16 -5.43 7 122 2002 2006 1948 1984 bottom-tenth 9 30.99 32.56 -1.57 45 84 2002 2006 1983 1984 normal 10 33.95 35.87 -1.92 42 87 2002 2006 1983 1984 bottom-third 11 38.40 39.21 -0.81 51 78 2002 2006 1983 1984 normal 12 42.51 42.03 0.48 63 66 2002 2006 1983 1984 normal 18 69.24 63.58 5.66 97 31 2002 2007 1983 1984 top-third 24 96.98 84.00 12.98 117 11 1966 2007 1984 1978 top-tenth 36 134.49 125.95 8.54 97 30 1967 2008 1983 1984 top-third 48 185.10 167.95 17.15 111 15 1968 2009 1984 1978 top-third 60 222.62 209.88 12.74 96 29 1969 2010 1983 1984 top-third