Year	thousand metric tons of CO2 equivalent
1970	12.891228473973307
1971	12.976572942853002
1972	14.249489073955997
1973	13.8343257761717
1974	13.918768587231595
1975	15.7250486211658
1976	14.766320219719402
1977	15.747678670680491
1978	15.056289068186295
1979	15.704664528346104
1981	84.80601059019568
1982	89.34128096485139
1983	122.40944619143013
1984	113.5427674652338
1988	62.39841685628898
1989	53.55939128851897