Year	thousand metric tons of CO2 equivalent
1970	294.25076
1971	293.42895
1972	297.27946
1973	301.66906
1974	294.55146
1975	300.89251
1976	312.914
1977	324.0988
1978	312.4738
1979	291.16657
1980	268.97057
1981	276.39631
1982	293.96215
1983	311.2803
1984	321.4793
1985	313.1155
1986	316.2217
1987	291.45332
1988	312.356
1989	322.6387
1990	329.9144
1991	333.2624
1992	264.15379
1993	270.40246
1994	273.83509
1995	248.95387
1996	244.73322
1997	250.58199
1998	242.10814
1999	240.29867
2000	241.57711
2001	239.12439
2002	239.07913
2003	230.33899
2004	213.87799
2005	214.82969
2006	208.1588
2007	205.81024
2008	201.38685
2009	208.76609
2010	216.1072
2011	218.268272
2012	220.429344