Year	Mt of CO2 equivalent
1990	-31.17484269628716
1991	-31.376933931627974
1992	-31.60776684049662
1993	-31.85643470955136
1994	-31.871659009467987
1995	-31.84915015413523
1996	-32.052025536433284
1997	-32.18426209541246
1998	-32.21352180428467
1999	-32.36647212862957
2000	-32.383993865461484
2001	-32.92337618012965
2002	16.619471612322197
2003	16.26901218241389
2004	16.05591263554538
2005	15.760661289425206
2006	14.074409760188843
2007	15.188078249219659
2008	15.216435994408135
2009	17.56333955116425