Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.008894706
1971	0.009654237
1972	0.010344514
1973	0.010748599
1974	0.011134766
1975	0.011588234
1976	0.012136903
1977	0.012389088
1978	0.012780556
1979	0.012995448
1980	0.013476568
1981	0.013385552
1982	0.013228568
1983	0.012141677
1984	0.011641244
1985	0.011051779
1986	0.010556368
1987	0.01003284
1988	0.009493068
1989	0.008909493
1990	0.008368171
1991	0.007824772
1992	0.007279327
1993	0.006731774
1994	0.006170798
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0