Year	thousand metric tons of CO2 equivalent
1990	5367.3078
1991	4794.7306
1992	4825.5736
1993	4203.4688
1994	4377.3816
1995	4281.3064
1996	5368.8872
1997	5214.9106
1998	5482.0974
1999	5640.2162
2000	5180.134
2001	5316.767
2002	4669.0938
2003	4646.0584
2004	4885.2332
2005	4755.186
2006	4631.0392
2007	4820.7758
2008	4856.655
2009	5259.7596
2010	5588.0662
2011	5695.1972
2012	5221.0196
2013	4986.8214
2014	4323.5628
2015	4785.88
2016	4341.413
2017	4536.2156
2018	4561.9628
2019	4548.1058
2020	4052.353