Year	thousand metric tons of CO2 equivalent
1990	4696.485
1991	4585.84
1992	4525.5375
1993	4580.4775
1994	4606.6875
1995	4649.87
1996	4704.79
1997	4709.3175
1998	4691.45
1999	4649.815
2000	4681.2575
2001	4614.43
2002	4616.8175
2003	4576.895
2004	4704.6775
2005	4596.6975
2006	4594.2125
2007	4693.8525
2008	4626.305
2009	4633.27
2010	4699.945
2011	4644.7825
2012	4626.225
2013	4399.015
2014	4296.8425
2015	4208.99
2016	4195.055
2017	4219.6325
2018	3903.2625
2019	3853.6025
2020	3914.26