Year	thousand metric tons of CO2 equivalent
1990	44137.7
1991	43634.4
1992	44981.8
1993	45555.5
1994	46816.9
1995	47904.4
1996	49014.1
1997	49987.2
1998	50785.1
1999	51365.1
2000	52773
2001	52555.6
2002	52692.8
2003	53829.1
2004	55006
2005	56031
2006	56770.6
2007	57199.4
2008	55063.9
2009	52122.1
2010	54364.2
2011	53594.9
2012	52419.4
2013	54635.8
2014	54828.4
2015	55038
2016	55155.3
2017	54934
2018	56188
2019	55043.3
2020	47628.8