Year	thousand metric tons of CO2 equivalent
1990	7466.444256
1991	7235.136538
1992	7120.34318
1993	6664.267405
1994	6796.311378
1995	6605.402997
1996	6900.826556
1997	6601.398351
1998	6390.556672
1999	6407.540021
2000	6471.828641
2001	6192.60318
2002	6117.117927
2003	6037.697221
2004	6101.364337
2005	5882.573463
2006	5679.820398
2007	5937.436224
2008	5659.670612
2009	5416.6869
2010	5645.402681
2011	5434.319698
2012	5169.676849
2013	4876.005793
2014	4742.849798
2015	4565.368038
2016	4550.347587
2017	4602.55172
2018	4406.498054
2019	4419.122187
2020	4423.24792