Year	thousand metric tons of CO2 equivalent
1990	52063.145
1991	48567.0225
1992	43365.8675
1993	41877.9825
1994	41306.4825
1995	41152.565
1996	40767.175
1997	40599.495
1998	39393.705
1999	38853.1
2000	37956.875
2001	37674.5175
2002	37047.5675
2003	36018.725
2004	35030.035
2005	34833.9075
2006	34058.555
2007	34071.0625
2008	34702.1025
2009	34619.485
2010	34203.88
2011	33947.295
2012	33981.635
2013	34268.585
2014	34569.8975
2015	34264.305
2016	33835.9675
2017	33552.525
2018	32618.9175
2019	31887.32
2020	31172.785