Year	Mt of CO2 equivalent
1990	-35.583292447671
1991	-37.041436570770664
1992	-37.8458190315951
1993	-39.13103447327327
1994	-39.73439709976933
1995	-38.98726116245126
1996	-38.00267862565736
1997	-38.38970593693564
1998	-40.48080222105316
1999	-39.2078244131999
2000	-37.99921956024094
2001	-39.0071879316413
2002	-36.536077454780134
2003	-36.17372993099857
2004	-35.491983930765954
2005	-37.181083829733765
2006	-37.19981571701893
2007	-36.11444241779812
2008	-36.414555225047465
2009	-36.53339255161559