Year	thousand metric tons of CO2 equivalent
1990	68886.87338199999
1991	66840.663633
1992	64052.20437600001
1993	64873.675363999995
1994	62268.799403
1995	62336.27140599999
1996	64215.124503
1997	62464.266502000006
1998	60550.93565399999
1999	59187.404368999996
2000	57960.669267000005
2001	57916.232858
2002	57712.32148399999
2003	60033.307882999994
2004	58413.05757600001
2005	59761.334218
2006	59919.803381000005
2007	58919.80136099999
2008	59803.199838
2009	57643.414612000015
2010	59732.739189000014
2011	56232.727254000005
2012	56678.82651299999
2013	55285.23123799999
2014	51207.066834000005
2015	51849.77782999999
2016	51397.322412999994
2017	52123.27232400002
2018	52061.12223299999
2019	51534.872146999995
2020	50002.32205699999