Year	thousand metric tons of CO2 equivalent
1990	7202.4
1991	6952
1992	7113.8
1993	7293.8
1994	7632.4
1995	9006.8
1996	9363.3
1997	9894
1998	10785.7
1999	10822.5
2000	10190.9
2001	10024.2
2002	9613.7
2003	9735.4
2004	9719
2005	9776
2006	10078.4
2007	10329.8
2008	11050.1
2009	12187.8
2010	13650.3
2011	15335.4
2012	16106.1
2013	17152.9
2014	17111.4
2015	16914.9
2016	15831.6
2017	15454.2
2018	15457
2019	16351.6
2020	13142.6