Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.0451967026562566
1971	0.0490559438621802
1972	0.0525633902915093
1973	0.0546168216531591
1974	0.0565788913862605
1975	0.0588830946662706
1976	0.0616711995374889
1977	0.0629525726312216
1978	0.0649417358127891
1979	0.0660336647939916
1980	0.0684783759579072
1981	0.0680158970933933
1982	0.0672182155641363
1983	0.0616953526117028
1984	0.0591525589638053
1985	0.0561573677345441
1986	0.0536399873212543
1987	0.0509797887300038
1988	0.0482370496329613
1989	0.045271682199686
1990	0.0425211721135486
1991	0.0397599506640642
1992	0.0369884379046972
1993	0.0342062137819833
1994	0.0313557309712734
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