Year	thousand metric tons of CO2 equivalent
1990	3037.532479
1991	2978.204093
1992	2595.145
1993	2403.38
1994	2390.87
1995	2294.105
1996	2189.8175
1997	2143.455
1998	2065.5325
1999	2101.81
2000	2090.645
2001	2106.0575
2002	2175.01
2003	2269.935
2004	2404.3775
2005	2595.9425
2006	2754.37
2007	2872.96
2008	3324.66
2009	3562.41
2010	3621.0475
2011	3739.655
2012	3947.3
2013	4084.53
2014	4146.6825
2015	4321.4075
2016	4463.69
2017	4538.0975
2018	4556.8575
2019	4625.2175
2020	4473.7725