Year	Mt of CO2 equivalent
1990	-13.735235984819537
1991	-19.611514784598594
1992	-14.525185749469955
1993	-18.3637386375571
1994	-17.13956009459365
1995	-16.44597531669688
1996	-11.607460218340059
1997	-20.407016694544076
1998	-18.41241757768065
1999	-22.772267719650287
2000	-17.471100694455227
2001	-20.111285780819152
2002	-16.356765322237905
2003	-17.787302700758577
2004	-17.743078717663987
2005	-17.678889770612322
2006	-17.667870210707612
2007	-17.613395983881905
2008	-17.58650781155418
2009	-17.524467947360325