Year	thousand metric tons of CO2 equivalent
1990	7771.805
1991	12007.06
1992	12542.49
1993	13060.6975
1994	13683.565
1995	14331.245
1996	16113.8225
1997	16597.6275
1998	17151.2325
1999	18312.815
2000	19858.8625
2001	18468.065
2002	19863.7975
2003	21063.3175
2004	22085.195
2005	23424.3375
2006	24288.1575
2007	25713.45
2008	26785.535
2009	27692.445
2010	29442.6575
2011	31091.75
2012	32812.37
2013	34411.64
2014	36072.15
2015	39043.28
2016	41672.71
2017	43397.48
2018	46101.4325
2019	48169.3325
2020	51369.7175