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• <br /> <br /> <br />Table 1 <br />Historical Production Rates (1945 to Present) <br />Year <br />1945-1965 <br />1966 <br />1967 <br />1968 <br />1969 <br />1970 <br />1971 <br />1972 <br />1973 <br />1974 <br />1975 <br />1976 <br />1977 <br />1978 <br />1979 <br />1980 <br />1981 (Jan-Sept) <br />Coal Production (tons) <br />1,119,825 <br />97,958 <br />92,571 <br />124,371 <br />140,564 <br />171,647 <br />117,635 <br />148,331 <br />149,117 <br />134,332 <br />132,135 <br />109,226 <br />226,221 <br />227 , 327 <br />250,152 <br />239 ,217 <br />228,629 <br />4 <br />