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Technical notes

Table Iron ore production
Technical note

Data relate to the gross weight of marketable iron ores in the state in which they leave the mine, including manganiferous iron ores but excluding pyrites. The actual iron content may vary somewhat from period to period. For detailed description of series and methods see the United Nations Industrial Commodity Statistics Yearbook (United Nations publication).

Data source United Nations Statistics Division, country responses to the Monthly Bulletin of Statistics questionnaire, supplemented by international and national publications.
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