Year	thousand metric tons of CO2 equivalent
1990	144835
1991	160222.5
1992	160369.4
1993	164332.2
1994	169247.1
1995	188070.8
1996	208650.2
1997	222029.8
1998	219138.2
1999	201845.6
2000	210630.1
2001	211496
2002	189382.5
2003	176369.2
2004	196792.6
2005	207403.7
2006	204848.7
2007	203223.1
2008	208917.3
2009	195165.7
2010	191326.8
2011	192712.9
2012	201376.6
2013	203851.7
2014	199952.6
2015	192787.3
2016	177887.2
2017	152731.3
2018	120751.8
2019	90608.7
2020	59732.9