Year	thousand metric tons of CO2 equivalent
1990	186.5
1991	150.7
1992	91.9
1993	66.1
1994	36.5
1995	32.2
1996	38.6
1997	40.2
1998	43.9
1999	36.6
2000	30.2
2001	26.7
2002	31.3
2003	36.6
2004	40
2005	35.2
2006	35.7
2007	50.1
2008	58.2
2009	63.2
2010	55.8
2011	73.2
2012	103.6
2013	100.2
2014	92.8
2015	84.7
2016	95.1
2017	58.3
2018	57
2019	46.6
2020	51