Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.007730377
1971	0.008056838
1972	0.008384074
1973	0.008700367
1974	0.008843742
1975	0.008964921
1976	0.009038918
1977	0.009185362
1978	0.00938711
1979	0.009464579
1980	0.009542854
1981	0.009235892
1982	0.008809022
1983	0.00838829
1984	0.008193052
1985	0.007917369
1986	0.007551445
1987	0.007156009
1988	0.006761348
1989	0.00636616
1990	0.005968275
1991	0.00557039
1992	0.005172505
1993	0.00477462
1994	0.004376735
1995	0.00397885
1996	0.00397885
1997	0.00397885
1998	0.00397885
1999	0.00397885
2000	0.00397885
2001	0.00397885
2002	0.004795328
2003	0.004795328
2004	0.005974537
2005	0.005974537
2006	0.006564157
2007	0.006858967
2008	0.007301182