Year	Mt of CO2 equivalent
1990	3.921699275001468
1991	3.8918030943155553
1992	3.3100579604194027
1993	2.259751117351345
1994	2.0776973918228308
1995	2.453116934959766
1996	2.217383391040327
1997	1.9259921351245999
1998	1.353406954601438
1999	1.1022706154286817
2000	0.42245739939474797
2001	-0.09015646679841609
2002	-0.9822751559096609
2003	-1.344878310900504
2004	-2.4280936591827236
2005	-2.9582291432409678
2006	-3.158126587815674
2007	-3.5244162324954615
2008	-3.9621713830799217
2009	-4.079137852493133