Year	Mt of CO2 equivalent
1990	-9.325896719804227
1991	-8.023962198899063
1992	-10.831703861704833
1993	-11.232051219426944
1994	-12.378444381383042
1995	-10.81543250595329
1996	-13.570127505155586
1997	-14.102595124354362
1998	-13.044535047624015
1999	-13.834856997928
2000	-13.561212871614405
2001	-13.779154711942066
2002	-13.561147545681209
2003	-7.806265293524794
2004	-11.615729508110837
2005	-6.215758189401569
2006	-11.900709867608402
2007	-12.556281245322536
2008	-13.45436078996768
2009	-14.094561257391293