Year	thousand metric tons of CO2 equivalent
1970	0.020309210872591965
1980	0.41436722221370825
1981	-2.578242501449602
1982	-2.5301922146797104
1983	-2.3527399795531907
1984	-2.1144665839195005
1985	-2.271966464805608
1986	0.4426995515819949
1987	-11.645390120983008
1988	2.6925199751850064
1989	0.14051591682400666