Year	thousand metric tons of CO2 equivalent
1990	557832.957329
1991	546289.166339
1992	530982.7286690001
1993	524488.1056
1994	529573.8928
1995	524082.4680000001
1996	527631.7374
1997	523151.69480000006
1998	524985.4676000001
1999	538737.7802000002
2000	536810.7632
2001	542669.92
2002	535128.6724
2003	500646.10899999994
2004	524132.3532
2005	494674.785
2006	515235.6227999999
2007	517448.6006000001
2008	492432.51379999996
2009	491737.24999999994
2010	487442.74220000004
2011	546297.5932
2012	545549.941
2013	508623.6584000001
2014	523268.45119999995
2015	519611.9614
2016	507016.54439999996
2017	529597.2559999998
2018	524923.5133999999
2019	507081.568
2020	498837.33840000007