Year	thousand metric tons of CO2 equivalent
1990	52.215406
1991	58.728525
1992	78.949644
1993	78.996163
1994	62.801681
1995	84.3042
1996	54.984793
1997	64.762987
1998	75.67358
1999	80.117573
2000	75.919567
2001	67.831975
2002	66.955982
2003	65.45419
2004	67.975398
2005	64.983606
2006	62.045653
2007	59.167299
2008	57.629946
2009	62.141992
2010	64.061439
2011	62.4074
2012	63.643961
2013	65.029522
2014	65.193284
2015	66.578845
2016	67.238244
2017	55.560442
2018	55.534441
2019	56.19384
2020	59.475638