Year	thousand metric tons of CO2 equivalent
1990	29810.6088
1991	28749.7884
1992	27862.9404
1993	27762.6634
1994	28456.4074
1995	28346.6242
1996	29246.2266
1997	28553.8832
1998	28060.574
1999	27776.0138
2000	26550.012
2001	25818.5412
2002	25780.4866
2003	25253.9504
2004	25249.242
2005	24720.7688
2006	24180.7332
2007	23816.4282
2008	23917.927
2009	23144.915
2010	23500.578
2011	23538.8412
2012	23291.7396
2013	23401.7314
2014	24206.5698
2015	24179.422
2016	23997.0758
2017	24288.5496
2018	23965.6666
2019	24182.104
2020	23119.9426