Year	Mt of CO2 equivalent
1990	0.3477497855414911
1991	0.17242837226792534
1992	-0.19575227546828347
1993	-0.3058267327828492
1994	-0.1359564156088299
1995	-0.23809917119058616
1996	-0.4106377463134771
1997	-0.4510810946983106
1998	-0.19549851502629634
1999	-0.31881132767778925
2000	-0.3854065709778581
2001	-0.45155716309452404
2002	-0.4512587272018379
2003	-0.4597352808393191
2004	-0.41449340308418536
2005	-0.3856540537678613
2006	-0.275587012198803
2007	-0.27317551135128376
2008	-0.27233887117905586
2009	-0.296432331061969