Year	thousand metric tons of CO2 equivalent
1990	36134.288
1991	34609.2432
1992	32414.9202
1993	31579.0004
1994	32534.597
1995	32573.4264
1996	32498.7476
1997	32810.5152
1998	33151.3974
1999	33721.2628
2000	32473.7156
2001	32274.6218
2002	31699.8096
2003	31425.888
2004	31449.7578
2005	31198.1862
2006	29692.0942
2007	30857.6914
2008	29995.637
2009	30060.2732
2010	30911.7188
2011	29824.8532
2012	30074.7858
2013	30608.8018
2014	31701.24
2015	30816.8356
2016	30186.5656
2017	29116.6264
2018	27409.8314
2019	27752.5612
2020	26826.1388