Year	thousand metric tons of CO2 equivalent
1990	21571.5
1991	22761.9
1992	21164.1
1993	22799.7
1994	26471.5
1995	27120.2
1996	27811.6
1997	28571.2
1998	30007.1
1999	30127.5
2000	30203.8
2001	30812.8
2002	32482.1
2003	32140.4
2004	32651
2005	30037.4
2006	31468.7
2007	30155.5
2008	31695.9
2009	29152.3
2010	28778.4
2011	27831.7
2012	26342.6
2013	24981.2
2014	22658.5
2015	22005.8
2016	22508
2017	22601.5
2018	26169.8
2019	25939
2020	24772.9