Year	thousand metric tons of CO2 equivalent
1990	96.6
1991	100.6
1992	60.4
1993	35.6
1994	7.8
1995	6.2
1996	4
1997	4.5
1998	4.6
1999	4.9
2000	16.5
2001	16.3
2002	15.8
2003	17.4
2004	17.6
2005	18.7
2006	18.5
2007	24.8
2008	28.9
2009	26
2010	29.1
2011	29.5
2012	29.8
2013	28.9
2014	37.2
2015	38.6
2016	38.8
2017	40.3
2018	39.9
2019	43.9
2020	47.6