Year	Mt of CO2 equivalent
1990	-28.57443629238384
1991	-30.587246339190653
1992	-28.782892740226043
1993	-22.48772336737134
1994	-31.73408025629417
1995	-31.22179504741217
1996	-29.28835077371768
1997	-26.427874770870805
1998	-24.46433095522896
1999	-31.368449800938862
2000	-30.90277833395332
2001	-28.95121554294305
2002	-25.63211709878916
2003	-22.27660693992751
2004	-22.888591096867255
2005	-26.20997921337834
2006	-28.420577678736617
2007	-27.55948077996547
2008	-27.138455793252373
2009	-30.043537800000028