Year	thousand metric tons of CO2 equivalent
1990	16255.44991
1991	16792.73133
1992	18167.41502
1993	19203.12354
1994	20323.18595
1995	20621.59464
1996	21815.46671
1997	22492.09479
1998	23774.38928
1999	24214.36536
2000	25740.4487
2001	23001.86288
2002	24486.31174
2003	24997.09695
2004	25339.73379
2005	26437.16509
2006	24770.19243
2007	26400.39587
2008	26030.85597
2009	26594.61665
2010	25040.00284
2011	25053.39504
2012	26464.635
2013	26869.7362
2014	26798.2162
2015	26938.3954
2016	28261.9922
2017	27866.0992
2018	28237.6754
2019	27726.0392
2020	28242.8904