Year	thousand metric tons of CO2 equivalent
1990	12996.50282
1991	11679.97367
1992	10968.20823
1993	10810.90169
1994	10225.9882
1995	9987.263654
1996	9837.286625
1997	9624.648177
1998	9118.946296
1999	8339.230307
2000	7606.140307
2001	7226.830951
2002	6763.985124
2003	6708.414368
2004	6455.511448
2005	6884.296096
2006	7139.855786
2007	6688.257913
2008	6665.032889
2009	6349.361053
2010	6487.610424
2011	6449.827554
2012	6265.588811
2013	5392.948773
2014	5301.540808
2015	5201.415229
2016	4885.562787
2017	4929.793738
2018	4959.224689
2019	4988.25564
2020	5014.286591