Year	thousand metric tons of CO2 equivalent
1990	0
1991	0
1992	0
1993	0
1994	0
1995	517.2
1996	532.3
1997	546.4
1998	562.3
1999	574.8
2000	584.7
2001	593.5
2002	600.8
2003	607.7
2004	614.1
2005	620.9
2006	625.2
2007	633.4
2008	639
2009	641.1
2010	646.4
2011	651.1
2012	654.8
2013	658.8
2014	663.7
2015	670.3
2016	674.9
2017	678.2
2018	675
2019	680.8
2020	678.1