Year	thousand metric tons of CO2 equivalent
1990	3855.1675
1991	3821.14
1992	3765.0075
1993	3346.7675
1994	3640.865
1995	3386.605
1996	3370.635
1997	3270.16
1998	3105.62
1999	2756.015
2000	2864.3525
2001	2982.3325
2002	3335.5675
2003	3986.24
2004	3900.6675
2005	4112.0075
2006	3969.9575
2007	4008.8275
2008	4085.155
2009	4285.635
2010	4305
2011	4348.5475
2012	4343.2475
2013	4422.17
2014	4461.5425
2015	4419.4225
2016	4464.635
2017	4435.7625
2018	4521.4425
2019	4523.16
2020	4657.335