Year	thousand metric tons of CO2 equivalent
1990	481.725324
1991	402.531493
1992	325.737662
1993	256.443831
1994	188.65
1995	119.456169
1996	114.161648
1997	106.267127
1998	100.972606
1999	75.178084
2000	72.883563
2001	72.96192
2002	92.240276
2003	66.018632
2004	87.596989
2005	87.175345
2006	86.35918
2007	79.643015
2008	76.926851
2009	76.810686
2010	74.594521
2011	73.578774
2012	71.663027
2013	70.14728
2014	68.731533
2015	71.615786
2016	64.115632
2017	60.915478
2018	61.515324
2019	59.81517
2020	59.515016