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Values on this page may differ from values found in publications due to data updates. In particular, values in constant PPP dollars and local currencies are most frequently updated based on the latest World Development Indicators (WDI) data. Data was most recently updated to the 9/24/15 version of WDI. Per 100,000 farmers and per million population ratios are calculated based on data from FAOSTAT. Farmer data comes from the FAOSTAT indicator ‘total economically active population in agriculture’ which was recently discontinued by FAOSTAT due to poor data quality. ASTI is currently evaluating alternative data sources and indicators to replace it.