Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.70631578
1971	0.70167353
1972	0.70437208
1973	0.70066231
1974	0.69987522
1975	0.70420127
1976	0.70277062
1977	0.70969199
1978	0.70667104
1979	0.70932929
1980	0.69989537
1981	0.69801708
1982	0.69669245
1983	0.70164811
1984	0.69989165
1985	0.69336336
1986	0.69526087
1987	0.70535664
1988	0.7204431
1989	0.71577202
1990	0.70712984
1991	0.70335156
1992	0.70445392
1993	0.70365412
1994	0.71696087
1995	0.71986805
1996	0.71566259
1997	0.72680647
1998	0.73727858
1999	0.73683528
2000	0.74674908
2001	0.75058099
2002	0.75633366
2003	0.7704027
2004	0.76702339
2005	0.76702339
2006	0.76702339
2007	0.76702339
2008	0.76702339