Year	thousand metric tons of CO2 equivalent
1990	11992.8025
1991	11583.5725
1992	11876.105
1993	12560.0875
1994	11321.235
1995	13151.9225
1996	13146.315
1997	13282.6725
1998	13199.8125
1999	14029.3625
2000	13165.9875
2001	13147.79
2002	13348.405
2003	14499.9625
2004	14187.1875
2005	15362.045
2006	16243.015
2007	16527.395
2008	16709.7775
2009	17116.7775
2010	17292.1225
2011	18052.8575
2012	17495.225
2013	17341.0525
2014	16840.5
2015	16719.6
2016	16949.285
2017	17314.2225
2018	17335.3325
2019	17079.045
2020	16856.2425