Year	thousand metric tons of CO2 equivalent
1990	159360.7746
1991	159208.6456
1992	164015.4154
1993	164769.3852
1994	170045.8626
1995	167589.4188
1996	172721.2768
1997	172205.4984
1998	172389.0366
1999	170754.745
2000	167776.6522
2001	166497.815
2002	166507.053
2003	174039.2414
2004	172481.6848
2005	170481.6876
2006	176449.376
2007	176041.7418
2008	169923.623
2009	173791.6332
2010	175671.3874
2011	178461.2932
2012	176472.2028
2013	177717.068
2014	176675.8858
2015	177084.6822
2016	181396.8614
2017	179503.0118
2018	180234.5422
2019	178246.6736
2020	179437.571