Year	kt of CO2 equivalent
1970	30.1762
1971	29.6537
1972	30.158
1973	30.1951
1974	30.2513
1975	30.1776
1976	30.9317
1977	31.0588
1978	30.9315
1979	30.6081
1980	30.7001
1981	30.6593
1982	30.6791
1983	30.9756
1984	31.1521
1985	31.2142
1986	31.3841
1987	31.8741
1988	32.2843
1989	32.6563
1990	33.1291
1991	33.5249
1992	33.9007
1993	34.2361
1994	34.4653
1995	34.6663
1996	34.8553
1997	35.0364
1998	35.2059
1999	35.3786
2000	35.553
2001	35.7164
2002	35.8831
2003	36.0519
2004	36.2262
2005	36.4144
2006	36.644
2007	36.9227
2008	37.239
2009	37.5735
2010	37.941
2011	38.32041
2012	38.69982