Year	thousand metric tons of CO2 equivalent
1990	181.6
1991	178
1992	170.8
1993	167.7
1994	171.7
1995	169.1
1996	165.2
1997	163.9
1998	160.7
1999	158.4
2000	147.9
2001	147.8
2002	144.3
2003	140.9
2004	137.9
2005	135.5
2006	134.7
2007	132.9
2008	131.1
2009	133.3
2010	110.4
2011	106.3
2012	105.8
2013	115.8
2014	115.3
2015	123.6
2016	126.6
2017	102.2
2018	103.1
2019	104.6
2020	104.8