Year	thousand metric tons of CO2 equivalent
1990	372296.90584900003
1991	382065.909412
1992	386627.152395
1993	402051.25265599997
1994	419218.15291600005
1995	446346.02365000005
1996	479731.37591700006
1997	499998.92818199995
1998	504285.48044799996
1999	489831.7327139999
2000	512452.384981
2001	513835.477423
2002	480677.96987800003
2003	478965.51232100005
2004	509565.154766
2005	526622.047209
2006	525127.431111
2007	518585.0150120001
2008	525517.3989139999
2009	507399.5828159999
2010	520800.966715
2011	482790.25132199994
2012	498656.284257
2013	477658.44163200003
2014	461208.199008
2015	455750.2563829999
2016	439476.85173899995
2017	436377.54709399986
2018	414506.14244899986
2019	396058.13780500006
2020	322594.33316099993