Year	Mt of CO2 equivalent
1990	-20.129755692489017
1991	-21.140585407327315
1992	-14.173146589181592
1993	-13.255330458648373
1994	-11.298443529938236
1995	-9.887792143801402
1996	-12.332469076748628
1997	-11.070813354240814
1998	-11.166547014376587
1999	-13.241959937879676
2000	-12.723483238580767
2001	-15.94255198738256
2002	-16.651079903563755
2003	-18.053543320342044
2004	-21.32496756575644
2005	-26.660331676734476
2006	-29.750885655226043
2007	-26.960113082535322
2008	-34.85782160790353
2009	-37.17530014274199