Year	thousand metric tons of CO2 equivalent
1990	4982.786857
1991	5005.394329
1992	4790.360577
1993	4728.539648
1994	4679.154478
1995	4664.913131
1996	4723.682623
1997	4727.808305
1998	4714.600619
1999	4696.095997
2000	4692.583553
2001	4541.634812
2002	4626.898743
2003	4462.133691
2004	3976.572896
2005	3970.592938
2006	4011.320061
2007	4013.762061
2008	4329.189551
2009	3826.315638
2010	3816.063797
2011	3984.342215
2012	3789.293772
2013	3881.737923
2014	3919.363649
2015	4019.4351
2016	3998.88401
2017	3919.47158
2018	3857.48535
2019	3779.04452
2020	3759.74089