Year	thousand metric tons of CO2 equivalent
1990	350455.003
1991	357607.6586000001
1992	365629.81859999994
1993	356689.78880000004
1994	371080.2088
1995	410715.78820000007
1996	437442.99100000015
1997	404563.1908
1998	412562.3452
1999	426226.42000000004
2000	416375.58300000004
2001	413587.5248000001
2002	432378.42139999993
2003	435784.5912
2004	449906.8112
2005	453701.8412
2006	459686.0388
2007	466320.8598
2008	472604.96460000006
2009	486052.304
2010	488843.52099999995
2011	489858.24079999997
2012	497515.6488
2013	498861.6254
2014	502069.953
2015	506613.88679999986
2016	508294.10020000004
2017	511822.98639999994
2018	503721.05180000013
2019	487946.5708
2020	491649.9061999999