The GHDx is the world’s most comprehensive catalog of surveys, censuses, vital statistics, and other health-related data. It’s the place to start your health data search. For the information we provide about countries and organizations, we use the following sources:

• Population figures are estimated based on World Population Prospects: 2015 Revision, from the United Nations Population Division, and the WHO Human Mortality Database.
• Country start and end dates, notes, and sovereignty come from the CIA World Factbook.
• Organization start and end dates and acronyms generally come from the organization's website, as do the city and country of their location.

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