Year	thousand metric tons of CO2 equivalent
1990	164.6
1991	173.7
1992	175.8
1993	171.4
1994	177
1995	180.3
1996	178
1997	185.3
1998	188.3
1999	192.3
2000	199.7
2001	205.1
2002	209.5
2003	214.8
2004	219.9
2005	225.9
2006	229.1
2007	222.7
2008	228.7
2009	236.3
2010	243.5
2011	251.4
2012	264.6
2013	271.6
2014	281.7
2015	292.4
2016	298.4
2017	303.6
2018	312.7
2019	324
2020	327.1