Year	thousand metric tons of CO2 equivalent
1990	341780.84010499995
1991	325292.56022499996
1992	314385.077586
1993	310324.935608
1994	314121.239239
1995	312406.9773990001
1996	321121.02425599983
1997	316080.486056
1998	294175.69041399995
1999	283523.65280300006
2000	281168.63770400005
2001	280466.701549
2002	275066.61181699997
2003	275712.13777900004
2004	277560.234672
2005	271186.95316499996
2006	261652.11170600003
2007	266230.20613
2008	252729.30036400005
2009	238807.69217999998
2010	231389.67419700004
2011	225016.46273500004
2012	224182.99380499998
2013	224713.96054499998
2014	226569.709796
2015	228290.30152399995
2016	227020.959676
2017	229138.387283
2018	223989.95448599994
2019	223963.50608200004
2020	220238.851874