Year	thousand metric tons of CO2 equivalent
1990	4872.17
1991	4820.9925
1992	4721.04
1993	4629.665
1994	4641.505
1995	4565.8975
1996	4543.6225
1997	4382.1525
1998	4338.61
1999	4237.4625
2000	4187.5025
2001	4233.5625
2002	4189.3675
2003	4114.31
2004	4041.6225
2005	4076.2875
2006	4096.9475
2007	4086.4625
2008	4158.9125
2009	4094.8975
2010	4086.545
2011	4059.7975
2012	4028.1075
2013	3995.9175
2014	3994.545
2015	3950.13
2016	3925.9725
2017	3903.3375
2018	3900.4175
2019	3824.39
2020	3785.3325