Owing to rounding, individual figures may not add up to the totals. On the basis of newly available information, analysis and revisions are made to the data in order to enhance their quality and reliability. In the absence of reliable sources, or when information on fertilizers for the latest year is not available in time, provisional data supplied by the ad hoc Working Party on Fertilizer Statistics, which includes representatives of the fertilizer industry, are used. These figures are marked with asterisks, meaning data are from unofficial sources. Data can be acquired on standard tape in machine-readable form.
Prices are subject to revision.
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