Year	kt of CO2 equivalent
1970	2.48022
1971	2.55098
1972	2.61866
1973	2.68283
1974	2.74999
1975	2.81669
1976	2.88242
1977	2.94498
1978	3.00713
1979	3.06928
1980	3.13885
1981	3.2102
1982	3.29425
1983	3.38436
1984	3.49631
1985	3.63257
1986	3.80049
1987	4.0019
1988	4.23517
1989	4.49825
1990	4.78574
1991	5.11676
1992	5.45371
1993	5.79558
1994	6.14504
1995	6.46383
1996	6.83759
1997	7.22101
1998	7.60252
1999	7.98395
2000	8.35745
2001	8.73839
2002	9.11385
2003	9.48354
2004	9.85446
2005	10.224
2006	10.5398
2007	10.8867
2008	11.2675
2009	11.6763
2010	12.1211
2011	12.242311
2012	12.363522