Year	thousand metric tons of CO2 equivalent
1990	150.5075
1991	151.365
1992	154.99
1993	158.5525
1994	159.33
1995	161.41
1996	163.345
1997	165.3175
1998	169.8175
1999	171.585
2000	152.1325
2001	164.5625
2002	168.2925
2003	162.325
2004	164.775
2005	167.47
2006	182.6025
2007	162.2275
2008	184.2275
2009	186.72
2010	197.8775
2011	212.62
2012	219.625
2013	223.4125
2014	230.25
2015	233.4275
2016	229.3975
2017	231.1875
2018	231.4025
2019	231.53
2020	231.18