Year	thousand metric tons of CO2 equivalent
1990	3405.991
1991	3475.8124
1992	3408.673
1993	3321.21
1994	3312.9554
1995	3290.7842
1996	3143.6616
1997	3007.3564
1998	3296.6548
1999	3276.8676
2000	3638.7588
2001	3415.4376
2002	2885.981
2003	3134.364
2004	3341.4144
2005	3389.005
2006	4234.6098
2007	3859.2192
2008	2869.6804
2009	4355.866
2010	4000.6798
2011	6489.2182
2012	7086.0824
2013	3446.668
2014	2887.6796
2015	2832.0132
2016	3099.0808
2017	3122.8314
2018	2695.9762
2019	2201.0578
2020	3790.858