Data for a few silk producing countries are missing, although available data adequately represent world production. Hide and skin production data, when not reported as fresh weight, is converted by FAO, using appropriate conversion factors. Where no official data are available, estimates based on slaughterings and on other information are made. Food supply data represent only the average supply or the population as a whole, not what is actually consumed by individuals. Standard tapes are available in English, French, or Spanish.
Prices are subject to revision.