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ITRI ITRI is a not for profit membership based organisation limited by guarantee. It represents the tin industry and is sponsored and supported by its members, principally miners and smelters.	USGS Tin Statistics and Information Information about tin metal. Flow Studies for Recycling Metal Commodities in the United States, Historical Statistics for Mineral and Material Commodities in the United States , Metal Prices in the United States through 1998, Statistical Compendium