Year	thousand metric tons of CO2 equivalent
1990	516.5325
1991	573.17
1992	639.49
1993	568.86
1994	579.9925
1995	593.5125
1996	586.1675
1997	526.9625
1998	521.5775
1999	521.9425
2000	460.38
2001	497.0525
2002	362.155
2003	440.155
2004	429.73
2005	384.645
2006	388.8175
2007	368.6525
2008	388.4225
2009	479.765
2010	469.9625
2011	494.315
2012	463.94
2013	485.4375
2014	508.42
2015	487.5775
2016	503.8
2017	484.5175
2018	456.1425
2019	493.79
2020	498.645