Year	Mt of CO2 equivalent
1990	-0.008215051292214871
1991	-0.008250328307481061
1992	-0.008285605322747249
1993	-0.008320882338013412
1994	-0.008356159353279593
1995	-0.008358930198861416
1996	-0.008393173284321626
1997	-0.003375303548951478
1998	-0.0033659461356576725
1999	-0.0032402126655971574
2000	-0.003246738941866641
2001	-0.003424595601852136
2002	-0.003370500687219003
2003	-0.006000229737568385
2004	-0.006027422361808725
2005	-0.006048462741938599
2006	-0.006076995384483244
2007	-0.006097474279871433
2008	-0.0061200164085929674
2009	-0.006143954803981156