Year	thousand metric tons of CO2 equivalent
1990	4207
1991	4052.65625
1992	3991.0125
1993	3951.56875
1994	3883.325
1995	3768.38125
1996	3797.2375
1997	3776.59375
1998	3779.25
1999	3568.73896
2000	3410.427919
2001	3270.269887
2002	3155.211854
2003	3035.453821
2004	2922.395788
2005	2736.937756
2006	2624.187997
2007	2671.838239
2008	2619.788481
2009	2590.538722
2010	2536.688964
2011	2592.712743
2012	2653.436522
2013	2666.960301
2014	2735.484081
2015	2793.30786
2016	2781.853246
2017	2737.698632
2018	2699.844019
2019	2678.789405
2020	2808.534791