Year	thousand metric tons of CO2 equivalent
1990	45162.6
1991	45577
1992	45486.9
1993	48366.7
1994	49647.8
1995	52617.6
1996	55499.3
1997	55829.2
1998	55889
1999	56386.8
2000	59488.4
2001	57561.2
2002	60075.1
2003	66741.3
2004	67908.7
2005	70623.8
2006	71444.4
2007	70893.2
2008	70702.1
2009	66599.5
2010	66218.3
2011	63845.2
2012	66451.4
2013	65939.4
2014	68377.5
2015	68154
2016	70586.8
2017	69822.7
2018	70952.5
2019	69263.9
2020	65156.5