Year	thousand metric tons of CO2 equivalent
1970	-2.220446049250313E-16
1971	-7.771561172376096E-16
1972	-3.3306690738754696E-16
1973	2.220446049250313E-16
1974	-5.551115123125783E-16
1975	7.771561172376096E-16
1976	0
1977	-4.440892098500626E-16
1978	-8.881784197001252E-16
1979	-4.440892098500626E-16
1980	8.881784197001252E-16
1981	2.220446049250313E-15
1982	1.5543122344752192E-15
1983	-7.771561172376096E-16
1984	-6.661338147750939E-16
1985	4.440892098500626E-16
1986	1.1102230246251565E-16
1987	1.3322676295501878E-15
1988	0
1989	6.661338147750939E-16