1900 10.80 22.20 49.40 121.40 246.00 1904 11.00 21.60 49.20 116.00 245.40 1908 10.80 22.40 50.00 112.80 243.40 1912 10.80 21.70 48.20 111.90 236.80 1920 10.80 22.00 49.60 113.40 241.80 1924 10.60 21.60 47.60 112.40 233.60 1928 10.80 21.80 47.80 111.80 233.20 1932 10.30 21.20 46.20 109.80 231.20 1936 10.30 20.70 46.50 112.90 227.80 1948 10.30 21.10 46.20 109.20 225.20 1952 10.40 20.70 45.90 109.20 225.20 1956 10.50 20.60 46.70 107.70 221.20 1960 10.20 20.50 44.90 106.30 215.60 1964 10.00 20.30 45.10 105.10 218.10 1968 9.95 19.83 43.80 104.30 214.90 1972 10.14 20.00 44.66 105.90 216.30 1976 10.06 20.23 44.26 103.50 219.20 1980 10.25 20.19 44.60 105.40 218.40 1984 9.99 19.80 44.27 103.00 212.50 1988 9.92 19.75 43.87 103.45 215.96