Year	thousand metric tons of CO2 equivalent
1990	-256.627410888701
1991	-554.280700683601
1992	-848.2229461669995
1993	-873.3111419678025
1994	-1050.0442047118995
1995	-4184.8039093018015
1996	-5086.1959991455005
1997	-5219.179260253899
1998	-6274.6136627196975
1999	-8788.552810668902
2000	-4749.036682128899
2001	-4949.0712890625
2002	-3734.046417236299
2003	-8565.124481201201
2004	1515.3378295898
2005	-1019.888793945298
2006	-1976.921051025398
2007	-2271.160888671897
2008	-2581.048645019502
2009	-108.72692871090112
2010	411.4039916991969
2011	3706.069854736299
2012	2907.524932861299
2013	2864.793792724602
2014	4850.6493835449
2015	3024.805023193403
2016	2728.241485595703