Year	thousand metric tons of CO2 equivalent
1990	8973.2568
1991	10231.0254
1992	10077.2574
1993	10505.5728
1994	12623.7568
1995	12480.091
1996	13869.4266
1997	13590.588
1998	15485.3912
1999	15978.7004
2000	16867.6344
2001	15203.066
2002	16020.5396
2003	17161.0452
2004	17869.123
2005	17022.4156
2006	16707.0124
2007	18036.7778
2008	15331.1166
2009	20468.9942
2010	18199.4858
2011	16963.8288
2012	17991.5712
2013	20546.6828
2014	19089.5224
2015	21386.5064
2016	20533.7198
2017	20716.7812
2018	20978.3358
2019	20412.2252
2020	22649.5496