Year	kt of CO2 equivalent
1970	10.2469
1971	10.4531
1972	10.657
1973	10.8551
1974	11.0415
1975	11.2194
1976	11.5069
1977	11.6718
1978	12.2338
1979	12.4857
1980	12.6755
1981	12.937
1982	13.182
1983	13.3622
1984	13.6488
1985	13.9676
1986	13.8472
1987	14.3017
1988	14.5499
1989	14.8981
1990	15.1768
1991	15.486
1992	15.898
1993	16.3861
1994	16.8768
1995	17.2964
1996	16.964
1997	21.5183
1998	17.3478
1999	17.5546
2000	18.0514
2001	18.4167
2002	18.9009
2003	19.3188
2004	19.803
2005	20.1826
2006	20.6759
2007	21.2466
2008	21.7437
2009	22.2462
2010	22.7407
2011	22.968107
2012	23.195514