Year	thousand metric tons of CO2 equivalent
1990	4726.2
1991	5523.4
1992	5988.7
1993	6432.8
1994	6191.6
1995	6974.1
1996	7439.2
1997	7891.9
1998	8805.7
1999	9554.6
2000	9925.7
2001	10546.3
2002	10954.4
2003	11609
2004	13998.7
2005	15114.9
2006	15616.2
2007	15886.5
2008	15512.8
2009	16740.1
2010	16784.3
2011	17166.9
2012	17246.1
2013	17300.1
2014	17187.2
2015	15594.7
2016	14343.9
2017	13746.3
2018	13775.7
2019	14023
2020	13241.4