Year	kt of CO2 equivalent
1970	30.0712
1971	28.8934
1972	30.3225
1973	31.7915
1974	32.4329
1975	34.1441
1976	34.0384
1977	35.8448
1978	37.4172
1979	38.9435
1980	40.1023
1981	41.4119
1982	41.9906
1983	43.1531
1984	43.8917
1985	44.5059
1986	45.2793
1987	46.2038
1988	47.3548
1989	45.8573
1990	46.4886
1991	47.6965
1992	48.9552
1993	50.2266
1994	51.4761
1995	52.6878
1996	53.8501
1997	55.0175
1998	56.0646
1999	57.189
2000	58.318
2001	59.4542
2002	60.6005
2003	61.6726
2004	62.7558
2005	63.8273
2006	64.911
2007	66.0797
2008	67.3484
2009	68.6719
2010	70.0865
2011	70.787365
2012	71.48823