Year	thousand metric tons of CO2 equivalent
1990	398.34533
1991	368.930622
1992	340.105189
1993	332.475479
1994	324.558081
1995	323.97403
1996	318.816178
1997	320.577605
1998	331.545654
1999	343.928475
2000	324.700949
2001	330.666148
2002	335.049658
2003	344.174213
2004	347.358923
2005	390.154443
2006	405.08259
2007	420.180003
2008	442.513267
2009	461.487708
2010	446.792686
2011	431.983224
2012	422.827219
2013	414.926668
2014	429.491204
2015	449.305566
2016	451.539935
2017	469.239935
2018	475.339935
2019	475.839935
2020	448.039935