Year	thousand metric tons of CO2 equivalent
1970	3.637978807091713E-12
1971	200
1972	400.00000000000364
1973	600.0000000000073
1974	800
1975	999.9999999999964
1976	1200
1977	1399.9999999999964
1978	1600.0000000000036
1979	1800.0000000000036
1980	2000
1981	2200.0000000000073
1982	2400
1983	2600.0000000000036
1984	2799.9999999999964
1985	2999.9999999999854
1986	3200.0000000000073
1987	3399.9999999999964
1988	3600
1989	3799.9999999999964
1990	-179.51000000000204
1991	-128.91999999999825
1992	-140.69000000000233
1993	-126.66000000000349
1994	-156.3399999999965
1995	-42.400000000001455
1996	-156.45999999999913
1997	-118.41000000000349
1998	-29.55000000000291
1999	25.270000000004075
2000	248.27999999999884
2001	-10.509999999994761
2002	-77.16000000000349
2003	-665.179999999993
2004	-909.9799999999959
2005	374.58000000000175
2006	1468.8999999999942
2007	2529
2008	2956.800000000003
2009	3461.249292234599
2010	3647.2463123148045
2011	2751.0865349814994
2012	2266.3530677970994