1901-2000 Inches 1 2.54 2.52 0.02 72 58 1987 1957 1977 1975 normal 1933,1948,2006,2008 2 4.80 5.03 -0.23 52 78 1910 1973 1972 1977 normal 1996,2007 3 6.57 7.16 -0.59 29 101 1910 1983 1972 1977 bottom-third 1981 4 9.75 9.48 0.27 83 47 1910 1998 1977 1975 normal 5 12.47 11.82 0.65 94 35 1931 1983 1977 1975 top-third 6 15.33 14.05 1.28 103 26 1977 1983 1977 1975 top-third 7 17.52 16.22 1.30 98 31 1981 1983 1977 1975 top-third 8 20.74 18.71 2.03 112 17 1918 2019 1977 1974 top-third 2020 9 24.29 21.33 2.96 120 9 1918 2019 1977 1973 top-tenth 10 26.85 24.12 2.73 117 12 1931 2019 1977 1974 top-tenth 11 29.34 27.04 2.30 112 17 1931 2019 1977 1974 top-third 12 32.01 29.95 2.06 105 24 1918 2019 1977 1974 top-third 18 42.66 44.02 -1.36 39 89 1931 2020 1977 1976 bottom-third 24 57.99 59.92 -1.93 33 95 1955 2020 1977 1976 bottom-third 1982 36 88.24 89.88 -1.64 43 84 1955 2020 1977 1976 normal 48 120.14 119.77 0.37 60 66 1956 2019 1970 1977 normal 60 153.34 149.63 3.71 86 39 1957 2020 1972 1977 top-third 1962