09404450 1967 19.1 239 1 19661206 12.0 15 09404450 1968 18.3 34.0 1 19680513 10.0 2 09404450 1969 35.7 202 1 19690421 12.0 3 09404450 1970 15.7 24.0 4 8.60 3 09404450 1971 13.8 27.0 1 19701126 7.90 1 19710815 09404450 1972 13.3 155 1 19711225 7.20 1 19720720 09404450 1973 25.5 155 1 19730429 12.0 54 09404450 1974 13.8 31.0 1 19740302 7.60 2 09404450 1975 14.6 29.0 1 19750301 8.50 4 09404450 1976 12.9 54.0 1 19760209 8.00 2 09404450 1977 10.5 24.0 1 19770525 7.00 7 09404450 1978 19.2 70.0 1 19780416 8.60 3 09404450 1979 36.4 211 1 19790429 11.0 18 09404450 1980 46.2 285 1 19800421 15.0 15 09404450 1981 19.0 36.0 1 19810419 9.60 2 09404450 1982 17.7 47.0 1 19820927 11.0 39 09404450 1983 41.2 215 1 19830509 13.0 4 09404450 1984 19.6 68.0 1 19831108 9.70 1 19840916 09404450 1985 18.3 41.0 2 4.30 1 19850813 09404450 1986 16.6 63.0 1 19860220 4.70 1 19860804 09404450 1987 14.5 27.0 1 19861118 4.70 1 19870930 09404450 1988 13.0 34.0 1 19880228 4.80 2