Year	thousand metric tons of CO2 equivalent
1969	0
1970	0.666475386
1971	0.666475386
1972	0.71084488
1973	0.952568
1974	0.97518188
1975	0.98945862
1976	0.91731883
1977	0.78191021
1978	0.74100292
1979	0.74449352
1980	1.49528345
1981	1.74222542
1982	1.6258663
1983	2.26680029
1984	1.85880371
1985	1.88766626
1986	2.89587089
1987	2.89900499
1988	3.40337003
1989	3.46227468
1990	3.57635158
1991	3.55694589
1992	3.9918762
1993	4.286091992
1994	4.452623558
1995	4.42030085
1996	5.216684216
1997	6.448321656
1998	6.924994334
1999	7.346140308
2000	3.503918096
2001	3.693789934
2002	3.323081828
2003	3.341588332
2004	3.885927438
2005	4.03898473
2006	3.945212644
2007	4.140577403
2008	4.291534383