Year	kt of CO2 equivalent
1970	17.8173
1971	18.463
1972	19.202
1973	17.2912
1974	17.8602
1975	18.1127
1976	18.4659
1977	17.9988
1978	18.8802
1979	19.3656
1980	20.0199
1981	20.8512
1982	21.2497
1983	21.3873
1984	21.4782
1985	21.7777
1986	22.1029
1987	22.4624
1988	22.8303
1989	23.2502
1990	23.6707
1991	24.077
1992	24.5482
1993	24.9097
1994	25.2433
1995	25.5508
1996	25.8362
1997	26.1022
1998	26.3359
1999	26.55
2000	26.5386
2001	26.716
2002	26.6675
2003	26.9025
2004	27.0288
2005	27.2057
2006	27.3832
2007	27.5719
2008	27.7546
2009	27.9375
2010	28.1205
2011	28.401705
2012	28.68291