Year	thousand metric tons of CO2 equivalent
1990	3447.557437
1991	3538.612821
1992	3473.307405
1993	3387.978389
1994	3382.157773
1995	3362.220557
1996	3222.070686
1997	3089.338214
1998	3382.609343
1999	3366.194871
2000	3731.0588
2001	3514.258408
2002	2982.322617
2003	3233.226425
2004	3442.997633
2005	3497.909042
2006	4339.807518
2007	3964.710594
2008	2978.26547
2009	4468.044746
2010	4113.952223
2011	6604.25213
2012	7201.477837
2013	3565.824944
2014	3010.598051
2015	2958.193159
2016	3227.286342
2017	3251.962525
2018	2827.032909
2019	2333.440092
2020	3921.065876