Year	kt of CO2 equivalent
1970	21.769585
1971	23.113608
1972	24.488406
1973	25.919941
1974	27.953942
1975	30.801239
1976	32.000199
1977	33.916962
1978	35.067494
1979	36.187057
1980	38.247122
1981	39.433076
1982	40.082787
1983	41.469478
1984	42.118023
1985	42.490088
1986	42.657483
1987	43.283483
1988	43.989589
1989	44.728346
1990	45.298507
1991	45.779781
1992	46.307049
1993	46.757076
1994	47.22501
1995	47.586929
1996	48.032462
1997	48.594837
1998	42.021353
1999	42.622528
2000	43.272328
2001	43.885862
2002	44.52512
2003	45.143707
2004	45.717665
2005	48.057551
2006	49.566177
2007	51.748247
2008	53.838381
2009	56.6375496035154
2010	60.2122077074707
2011	60.8557130023383
2012	61.4927757344388