Year	thousand metric tons of CO2 equivalent
1970	15417.182163805168
1971	10531.688038521246
1972	12773.614578184053
1973	11157.402895389068
1974	12110.01702601828
1975	13479.149897815541
1976	15796.37912432456
1977	12721.160305516098
1978	15321.01846949202
1979	16323.649758881662
1980	17308.79485516283
1981	21243.825038617928
1982	21839.40796108237
1983	22706.13093860099
1984	19042.338177013724
1985	18233.39486826448
1986	17875.92166246361
1987	19652.3505152397
1988	17487.98794759998
1989	17707.30717119768
1990	100.6602158620816
1991	-937.8500698655466
1992	-966.5560003071653
1993	-52.34685470160696
1994	-480.56111960116027
1995	-297.75952425599
1996	-1922.8187610655948
1997	-1912.357332661702
1998	-2808.873801171752
1999	-3977.987571403374
2000	-8745.859967157194
2001	-9800.86464890838
2002	-10572.461961388575
2003	-13380.015150099967
2004	-13420.14350810648
2005	-15541.64901104565
2006	-15600.29326872527
2007	-18913.044340670116
2008	-20462.78749775889
2009	-6537.663835227504
2010	-19479.0860119015
2011	-13920.207159042353
2012	-9395.587390139744
2013	-14488.673668727299
2014	-15634.255208879717
2015	-17317.41434657578
2016	-17989.63555158671