Year	thousand metric tons of CO2 equivalent
1990	29001
1991	35111.6
1992	40670.3
1993	44172.4
1994	45340.1
1995	46925.9
1996	45376
1997	44650.2
1998	44624.3
1999	44884.3
2000	44050.1
2001	43977.1
2002	45609
2003	44023.2
2004	33913.6
2005	31871.2
2006	29940.1
2007	28739.9
2008	28271.3
2009	28555.6
2010	28444.7
2011	25775.2
2012	13949.5
2013	6327.5
2014	4526.4
2015	4322.6
2016	4163.6
2017	5730.6
2018	4446.9
2019	5529.9
2020	6080.1