Year	thousand metric tons of CO2 equivalent
1990	19000.0666
1991	19107.4408
1992	18837.366
1993	19381.5432
1994	19266.6668
1995	19053.21692
1996	19832.08054
1997	19898.31775
1998	20043.22417
1999	19700.58058
2000	19667.2414
2001	19130.20393
2002	20165.6904
2003	19073.23594
2004	18875.63261
2005	18976.77262
2006	18671.55093
2007	19248.99959
2008	19713.07303
2009	19567.49776
2010	19655.70324
2011	19581.75813
2012	19953.66882
2013	19419.91971
2014	19432.0744
2015	18558.40129
2016	17799.76218
2017	19516.32367
2018	18612.26076
2019	18209.84905
2020	17992.98714