Year	thousand metric tons of CO2 equivalent
1990	5429.889753
1991	4939.403772
1992	4034.994286
1993	3928.389649
1994	3925.785988
1995	4449.692094
1996	4558.704168
1997	4864.180793
1998	4541.906119
1999	4161.474674
2000	3752.843548
2001	4281.997043
2002	4264.257203
2003	4067.575329
2004	5217.538431
2005	4949.31471
2006	4698.307775
2007	4978.477875
2008	4475.018975
2009	5069.968276
2010	4256.961576
2011	4376.437346
2012	4877.785317
2013	4886.172087
2014	4135.357858
2015	3915.017028
2016	4258.69455
2017	3951.131472
2018	3481.141394
2019	4089.660916
2020	4373.700238