The 2006 High-level Dialogue on International Migration and Development and the subsequent creation of the Global Forum on Migration and Development have created an unprecedented demand for accurate, up-to-date and policy relevant migration data. In response, the United Nations Population Division of the Department of Economic and Social Affairs (DESA) has developed the United Nations Global Migration Database (UNGMD), a comprehensive collection of empirical data on the number (“stock”) of international migrants by country of birth and citizenship, sex and age as enumerated by population censuses, population registers, nationally representative surveys and other official statistical sources from more than 200 countries and territories in the world.

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