Year	thousand metric tons of CO2 equivalent
1990	664650.0771880002
1991	633610.577625
1992	595087.1120310001
1993	572566.6263049999
1994	555809.323128
1995	542531.4883259999
1996	543568.062076
1997	534446.931183
1998	504885.56534400006
1999	480228.038527
2000	476964.472265
2001	476054.69884
2002	475052.5703829999
2003	472335.41521700006
2004	474102.0694200001
2005	468720.01041900006
2006	462466.08648700005
2007	467166.814524
2008	459376.918956
2009	442586.84248
2010	435769.859332
2011	434162.4808570001
2012	434374.23517
2013	439440.9021809999
2014	445137.76027200004
2015	447719.32753500005
2016	452036.05527199997
2017	458688.16222800006
2018	452302.81859199994
2019	459886.26154
2020	460694.584706