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It collects, collates, analyses and reports data on national, urban/rural and city level in order to monitor human settlement conditions and trends. United Nations Human Settlements Programme (UN-HABITAT) looks at urbanization from a different angle. Those estimates are presented in World Urbanization Prospects. The Division also uses data on population density and urbanization as input for estimating urbanization. The latest estimates and projections of population size are published in the World Population Prospects. These estimates and projections are based on national data provided by the United Nations Statistics Division. United Nations Population Division prepares United Nations estimates and projections of population by age and sex for countries and areas of the world. Other agencies or organizations that deal with population size and structure include
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#Physiological density registration
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