Year	thousand metric tons of CO2 equivalent
1970	83.39806
1971	83.24027
1972	85.49583
1973	94.6244
1974	83.80044
1975	86.56564
1976	86.23766
1977	93.70835
1978	90.89789
1979	90.9292
1980	95.14551
1981	95.46171
1982	87.16363
1983	100.23354
1984	98.54931
1985	100.8895
1986	101.25282
1987	110.03791
1988	112.82636
1989	103.31959
1990	104.41668
1991	102.75229
1992	110.26793
1993	106.9965
1994	103.46901
1995	101.84337
1996	102.97704
1997	102.29411
1998	104.29578
1999	104.63151
2000	103.7384
2001	103.09143
2002	103.81187
2003	102.76562
2004	101.44099
2005	103.55271
2006	103.03036
2007	103.66028
2008	103.97803
2009	99.55247
2010	96.32165
2011	97.2848665
2012	98.248083