Year	thousand metric tons of CO2 equivalent
1990	17001.7
1991	17006
1992	18138.1
1993	18434.7
1994	18868.7
1995	20726.7
1996	22083.3
1997	22956.6
1998	23694.2
1999	24334.7
2000	24754.3
2001	25778.1
2002	25718.1
2003	26804.5
2004	27130.7
2005	25964.7
2006	26038.4
2007	25099
2008	25501.3
2009	23733.9
2010	23410.2
2011	22895.2
2012	23479.3
2013	23189.3
2014	23293.5
2015	23556.6
2016	23570.5
2017	23337.1
2018	24466
2019	26156.2
2020	23706