Year	thousand metric tons of CO2 equivalent
1990	28074.59936
1991	27393.13988
1992	27711.53973
1993	27649.86446
1994	29119.48405
1995	28880.8036
1996	29859.41728
1997	30359.04552
1998	28864.14642
1999	22673.96238
2000	25292.32497
2001	22048.74712
2002	21711.2931
2003	21855.58188
2004	22208.9057
2005	21887.06161
2006	21822.90448
2007	21048.00534
2008	20332.84651
2009	20128.10646
2010	20203.40305
2011	19333.66835
2012	19263.59167
2013	19705.74515
2014	19605.48336
2015	19050.43389
2016	19067.73076
2017	19169.9367
2018	18981.26024
2019	18890.32539
2020	18498.40533