Year	thousand metric tons of CO2 equivalent
1969	0
1970	5.51949790412866
1971	5.64424181158824
1972	5.88723644005177
1973	3.50069448993932
1974	3.59741390042856
1975	3.39919046046166
1976	3.33271720971698
1977	2.46446438811474
1978	2.96873794227521
1979	3.09929202925701
1980	3.41764571945517
1981	3.93217235863283
1982	4.00906923610133
1983	3.83220614488904
1984	3.61057186518012
1985	3.58852808943862
1986	3.58852808943862
1987	3.62270447942462
1988	3.62270447942462
1989	3.65688086941061
1990	3.67396906440362
1991	3.67396906440362
1992	3.75941024939534
1993	3.75941024939534
1994	3.75941024939534
1995	3.75941024939534
1996	3.75941024939534
1997	3.75941024939534
1998	3.75941024939534
1999	3.75941024939534
2000	3.55440399610897
2001	3.5430136163364
2002	3.31278084220732
2003	3.37220475570926
2004	3.32616920628421
2005	3.32616920628421
2006	3.30315153658506
2007	3.29164291176221
2008	3.27437934444775