Year	kt of CO2 equivalent
1970	272.7945278
1971	274.2888557
1972	306.7717664
1973	430.4914078
1974	443.2191477
1975	441.0006504
1976	434.9072854
1977	416.522605
1980	553.397894
1981	547.332982
1982	582.821154
1983	820.329836
1998	1584.064809
1999	1686.048907