VALUE OF PRODUCTS OF PRINCIPAL MINERALS 



AILLIONSOr DOLLARS 



80 160 240 320 4C0 4S0 560 640 700 



ALL MINERALS 



COAL BITUMINOUS 



GOLD AND SILVER 



COAL ANTHRACITE 



PETROLEUM 



IRON 



COPPER 



ALL OTHERS 



PROPORTION ffACH BflARS TO TOTAL 



