Year	thousand metric tons of CO2 equivalent
1990	12475.05696
1991	13334.10196
1992	13501.69456
1993	14477.24776
1994	13816.99836
1995	15734.25775
1996	16414.15944
1997	16344.80433
1998	17186.04942
1999	17597.65631
2000	18645.2418
2001	18921.53608
2002	19629.30276
2003	20047.90023
2004	21238.03751
2005	21060.34919
2006	21576.24096
2007	21917.66853
2008	22990.9349
2009	23715.34747
2010	24146.50643
2011	24191.96302
2012	23255.8166
2013	22747.77638
2014	22332.93536
2015	22360.49674
2016	22922.59507
2017	22872.5928
2018	22199.56133
2019	20367.87605
2020	20471.52798