Year	thousand metric tons of CO2 equivalent
1990	45440.4
1991	60379.5
1992	62496.5
1993	57897
1994	53404.8
1995	53187.9
1996	53462.3
1997	54814.9
1998	54951.5
1999	51622.7
2000	55473.8
2001	54066.4
2002	52991.4
2003	60647.6
2004	61880.7
2005	66174.8
2006	66105.3
2007	64026.4
2008	66927.6
2009	60725.8
2010	63065.6
2011	70038.9
2012	71314
2013	70499
2014	70843.7
2015	73182.3
2016	77225.4
2017	74649.2
2018	76723.5
2019	74174.4
2020	70871.4