1901-2000 Inches 1 1.75 4.01 -2.26 6 123 1911 1951 1952 1987 bottom-tenth 2 4.33 7.86 -3.53 7 122 1911 1951 1966 1987 bottom-tenth 3 7.66 10.34 -2.68 22 107 1911 1951 1980 1987 bottom-third 4 8.86 12.03 -3.17 15 114 1911 1957 1966 1987 bottom-third 5 9.18 12.92 -3.74 13 116 1956 1951 1966 1987 bottom-tenth 6 9.99 13.59 -3.60 15 114 1966 1915 1968 1987 bottom-third 7 11.29 14.44 -3.15 23 105 1956 2019 1968 1987 bottom-third 8 12.92 15.79 -2.87 26 102 1956 2019 1968 1987 bottom-third 9 14.00 17.76 -3.76 25 103 1956 2019 1968 1987 bottom-third 10 16.11 20.63 -4.52 13 115 1953 2019 1956 1987 bottom-tenth 11 20.65 23.74 -3.09 29 99 1956 2019 1968 1987 bottom-third 12 23.88 27.09 -3.21 29 99 1956 2019 1976 1987 bottom-third 18 42.21 40.67 1.54 76 52 1953 1916 1981 1987 normal 24 61.62 54.18 7.44 105 22 1956 2020 1986 1987 top-third 36 91.67 81.14 10.53 105 21 1956 1995 1986 1987 top-third 48 118.11 108.10 10.01 100 25 1956 2019 1986 1987 top-third 60 145.58 135.02 10.56 97 27 1937 2019 1986 1987 top-third