Year	thousand metric tons of CO2 equivalent
1990	454.574427
1991	474.220141
1992	478.999403
1993	462.504611
1994	461.697515
1995	460.817556
1996	469.002683
1997	472.107417
1998	481.893207
1999	486.497971
2000	511.864499
2001	513.305427
2002	507.915113
2003	517.598791
2004	520.958181
2005	524.497217
2006	526.281278
2007	526.72255
2008	537.880217
2009	530.527327
2010	535.014154
2011	516.964504
2012	524.833865
2013	529.772693
2014	513.318319
2015	506.177513
2016	517.24791
2017	521.34791
2018	522.74791
2019	527.24791
2020	499.94791