Year	thousand metric tons of CO2 equivalent
1990	6424.22227
1991	6187.344798
1992	6300.300608
1993	6489.060092
1994	6381.93
1995	6225.207301
1996	6397.881877
1997	6373.851967
1998	6332.010097
1999	6176.824758
2000	6220.340243
2001	5943.223019
2002	5899.108608
2003	5892.81703
2004	5947.074157
2005	5841.874913
2006	5814.370169
2007	5705.603981
2008	5884.004749
2009	5653.986539
2010	5900.570752
2011	5668.695873
2012	5594.201099
2013	5630.084656
2014	5843.499691
2015	5931.879051
2016	5951.423769
2017	6150.03832
2018	5982.125071
2019	6193.201422
2020	6381.072374