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This indicator is calculated by FAOSTAT and is part of the FAO Suite of Food Security Indicators -- Dimension: availability (http://www.fao.org/economic/ess/ess-fs/ess-fadata/en/#.WTlX9BPytPU). The indicator measures the national average protein supply (expressed in grams per caput per day) and provides information on the quality of the diet. It includes the following groups: meat; offals; animal fats and products; milk and products; eggs, fish, seafood and products; and acquatic products, other. The indicator is calculated in three year averages, from 1990-92 to 2011-13, to reduce the impact of possible errors in estimated DES, due to the difficulties in properly accounting of stock variations in major food (Source: Faostat - http://www.fao.org/faostat/en/#data/FS).