Year	thousand metric tons of CO2 equivalent
1990	164.9
1991	171.3
1992	173.5
1993	178.2
1994	185.9
1995	180.2
1996	181.1
1997	183.2
1998	179
1999	188
2000	187.5
2001	192.1
2002	199
2003	210.4
2004	231.6
2005	216
2006	236.1
2007	252.4
2008	280.3
2009	300.9
2010	300.2
2011	315
2012	338.3
2013	360.7
2014	374
2015	375.4
2016	369
2017	344.9
2018	351.3
2019	371.2
2020	330.2