Year	kt of CO2 equivalent
1970	19.9698
1971	20.3561
1972	21.05
1973	21.836
1974	20.9776
1975	21.548
1976	21.0867
1977	22.8596
1978	21.7584
1979	21.9242
1980	22.7306
1981	23.0682
1982	23.8669
1983	24.9723
1984	24.6363
1985	22.3878
1986	21.9011
1987	22.4462
1988	23.275
1989	24.3998
1990	24.0812
1991	24.2707
1992	24.2345
1993	24.4629
1994	24.8384
1995	25.1052
1996	25.3665
1997	25.3834
1998	25.6326
1999	26.0423
2000	26.5171
2001	26.8384
2002	27.2319
2003	27.5822
2004	27.9943
2005	28.3213
2006	28.7162
2007	28.9614
2008	29.4193
2009	29.879
2010	30.3529
2011	30.656429
2012	30.959958