Year	thousand metric tons of CO2 equivalent
1970	10346.804687500087
1971	13868.468750000044
1972	6168.257812499942
1973	18955.49218750006
1974	19849.28124999997
1975	18046.968749999913
1976	20329.60937500006
1977	21731.249999999927
1978	23471.164062499913
1979	22863.85937499994
1980	20275.210937499985
1981	20480.109375000087
1982	19448.71093749997
1983	9314.484375
1984	13942.171875000058
1985	17417.578125000087
1986	28733.45312499997
1987	47178.85546874988
1988	45346.39062499993
1989	43684.36718750006
1990	-40398.96484375
1991	-41129.97265625
1992	-27665.703125
1993	-22958.63671875
1994	-22917.53515625
1995	-23539.515625
1996	-20990.87890625
1997	-19967.21484375
1998	-19667.46484375
1999	-16816.640625
2000	-17940.8046875
2001	-15663.97265625
2002	-14811.3046875
2003	-2473.86328125
2004	-24077.81640625
2005	-10161.58984375
2006	-10820.0234375
2007	-14186.375
2008	-19068.640625
2009	-13243.046875
2010	-14986.52734375
2011	-21296.328125
2012	-15410.49609375
2013	-16654.4921875
2014	-16009.28125
2015	-11502.9140625
2016	-16702.1953125