data oilspill;
  input year tankers spills lost;
cards;
1973 3750 36 84.5
1974 3928 48 67.1
1975 4140 45 188
1976 4237 29 204.2
1977 4229 49 213.1
1978 4137 35 260.5
1979 3945 65 723.5
1980 3898 32 135.6
1981 3937 33 45.3
1982 3950 9 1.7
1983 3582 17 387.8
1984 3424 15 24.2
1985 3285 8 15
;
run;