Year	thousand metric tons of CO2 equivalent
1990	3728.4
1991	4489.8
1992	4560.1
1993	5857.5
1994	5371.8
1995	5413.5
1996	5601.7
1997	5152.3
1998	4540.1
1999	4578.2
2000	4068.7
2001	4348.5
2002	4453.5
2003	4510.4
2004	4724.5
2005	4957.1
2006	5324.3
2007	5046.4
2008	5221.5
2009	5269.9
2010	5818.2
2011	5493.7
2012	5664.9
2013	5595
2014	5268
2015	5270.1
2016	5496.2
2017	5523.4
2018	6342.3
2019	5835.4
2020	5770.9