Year	thousand metric tons of CO2 equivalent
1990	5182.274382
1991	5041.549177
1992	4495.389647
1993	4712.781695
1994	4798.77045
1995	4825.293644
1996	4835.152005
1997	4820.184074
1998	4870.360999
1999	5092.858806
2000	4864.98457
2001	4792.718432
2002	5001.228962
2003	4858.168844
2004	5005.149864
2005	5107.7145
2006	4768.371906
2007	4552.886095
2008	4149.012604
2009	3577.610211
2010	3460.493823
2011	3449.235519
2012	3442.143203
2013	3427.453185
2014	3467.422444
2015	3496.791153
2016	3527.449393
2017	3548.878477
2018	3508.964761
2019	3566.091645
2020	3522.994529