Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.631394145125387
1971	0.635044619759409
1972	0.628029306847287
1973	0.687129149101286
1974	0.724526698077821
1975	0.693324853693299
1976	0.662279668248398
1977	0.548626117374294
1978	0.654063443483684
1979	0.673538949334664
1980	0.945652870404603
1981	1.25942808516239
1982	1.47809502108648
1983	1.78165206336076
1984	1.86132193637735
1985	2.12963823829465
1986	2.39971475325265
1987	2.394449383074
1988	2.70052246159048
1989	2.6486069722641
1990	3.49739751129843
1991	3.34210721928154
1992	3.61611848005572
1993	3.36141956586552
1994	2.6261050673117
1995	2.69377251745462
1996	2.59565364634141
1997	2.49283987965982
1998	2.3579052357188
1999	2.36358663524984
2000	1.37059126506097
2001	1.26054772507065
2002	1.03929413771643
2003	1.18114150911245
2004	1.38038968210782
2005	1.65049622878826
2006	1.48280732787096
2007	1.70710448401197
2008	1.92700573023962