Year	thousand metric tons of CO2 equivalent
1990	503841.96499999997
1991	508364.53750000003
1992	515473.3775
1993	517334.09
1994	525794.9325
1995	529246.9275
1996	513883.255
1997	518790.8375
1998	522344.5725
1999	524760.5175
2000	529119.4299999999
2001	542594.73
2002	563979.07
2003	586010.4125000001
2004	602100.0700000001
2005	609211.835
2006	604521.525
2007	608385.7124999999
2008	605876.0149999999
2009	608373.525
2010	619608.1699999999
2011	615170.83
2012	615161.96
2013	613709.0349999999
2014	618084.8475
2015	621191.2275
2016	627253.4624999999
2017	630393.7549999999
2018	626426.4575
2019	635961.77
2020	645372.1099999999