Year	thousand metric tons of CO2 equivalent
1969	0
1970	14.0653370725088
1971	13.3990228432397
1972	13.7739134110765
1973	13.6711065920792
1974	13.5816060944164
1975	13.3803243627888
1976	14.0051011725568
1977	14.0046930759141
1978	13.7516045626965
1979	13.2964976364861
1980	13.2531061135939
1981	13.0707908880316
1982	12.9263371815001
1983	13.048908864378
1984	13.0342272943013
1985	12.8800616408288
1986	12.821743436162
1987	13.0670251906319
1988	13.1315220247174
1989	13.1315153206641
1990	13.2175162647022
1991	13.2691151135265
1992	13.3379153743541
1993	13.4067110839024
1994	13.4067020338505
1995	13.4066929854788
1996	13.4066929854788
1997	13.4066929854788
1998	13.4066929854788
1999	13.4066929854788
2000	13.4066929854788
2001	13.4066929854788
2002	13.4066929854788
2003	13.4066929854788
2004	13.4066929854788
2005	13.4066929854788
2006	13.4066929854788
2007	13.4066755650215
2008	13.4066755650215