Year	kt of CO2 equivalent
1970	2.66229757
1971	2.74295804
1972	2.82391503
1973	2.89465827
1974	2.96761155
1975	3.04146666
1976	3.11684045
1977	3.18837588
1978	3.25686166
1979	3.32302492
1980	3.40153842
1981	3.48884691
1982	3.58204284
1983	3.66574328
1984	3.78334923
1985	3.92426729
1986	4.10050459
1987	4.30977712
1988	4.5514134
1989	4.8212886
1990	5.1160915
1991	5.4531069
1992	5.7955346
1993	6.1426591
1994	6.4954702
1995	6.55592511
1996	6.93296305
1997	7.31969726
1998	7.70449605
1999	8.08908247
2000	8.46553305
2001	8.8469706
2002	9.22260823
2003	9.59218446
2004	9.96274548
2005	10.33170764
2006	10.65055804
2007	11.00040397
2008	11.3841499
2009	11.79593055
2010	12.24371151
2011	12.3661486251
2012	12.4885857402