Year	thousand metric tons of CO2 equivalent
1969	0
1970	4.87429324119447
1971	4.87163165642678
1972	3.93181172173081
1973	5.24289918752196
1974	5.25993871932109
1975	5.29432366585226
1976	4.8829463635677
1977	2.75079152195867
1978	4.07773495590444
1979	2.75723745239955
1980	4.7260859873098
1981	4.48873604780477
1982	3.38548033543089
1983	3.01618361118089
1984	2.27461958658463
1985	2.6909708574581
1986	2.55381057703708
1987	2.52185500971838
1988	3.64401172291998
1989	4.36517819280646
1990	5.19926515726333
1991	5.78447415092227
1992	6.11149885567099
1993	6.1401208135864
1994	5.9760679920709
1995	5.86153914008809
1996	5.81052189519065
1997	4.34432656240175
1998	4.09531625165952
1999	4.36827886996203
2000	3.24802087403
2001	3.17427952009793
2002	2.93574718259677
2003	3.01590218166042
2004	3.23530755687338
2005	3.63476137483159
2006	3.41300374432252
2007	3.75691826751479
2008	4.08185626636666