Year	thousand metric tons of CO2 equivalent
1990	11070.2
1991	11419.9
1992	11486.6
1993	12542.2
1994	14006.5
1995	14442.4
1996	15186.7
1997	15046.3
1998	15362.4
1999	16125.6
2000	15864.6
2001	15219.2
2002	14988.9
2003	14348.3
2004	13480.8
2005	12370.6
2006	11429.1
2007	11032.4
2008	10677.9
2009	9792.8
2010	9549
2011	8035.8
2012	7306
2013	7039.6
2014	6859.7
2015	7319.9
2016	7717.3
2017	7670
2018	7874.2
2019	7827.4
2020	7533.8