Year	thousand metric tons of CO2 equivalent
1990	7181.1
1991	7446.4
1992	7994.1
1993	9066.6
1994	9874.4
1995	10528.2
1996	10851.6
1997	11391.4
1998	10995.1
1999	11340.2
2000	12425.5
2001	13166.9
2002	12838.3
2003	12846.2
2004	12472.4
2005	12626.8
2006	12537.4
2007	12132.6
2008	12498.8
2009	13032.8
2010	13671.9
2011	14217.3
2012	15170.6
2013	16089.2
2014	16052.1
2015	16428.3
2016	17414.6
2017	16957.6
2018	18069.3
2019	18077.8
2020	17650.9