Year	thousand metric tons of CO2 equivalent
1990	3639.187207
1991	3742.460857
1992	3794.037508
1993	3906.692159
1994	3965.651209
1995	3967.51286
1996	4340.404728
1997	4231.730596
1998	4134.084464
1999	4484.891932
2000	4961.6414
2001	4570.313262
2002	4221.824323
2003	3844.478985
2004	4423.991246
2005	4556.964908
2006	4687.491849
2007	4354.07939
2008	4622.261931
2009	4654.380673
2010	4965.908814
2011	5080.064319
2012	4755.932424
2013	5006.97733
2014	4940.596835
2015	4713.37214
2016	5406.106761
2017	5586.070382
2018	5385.904204
2019	5696.805225
2020	6023.255046