World population ageing 2013

image of World population ageing 2013
World Population Ageing 2013 provides a description of global trends in population ageing and includes a series of indicators of the ageing process by development regions, major areas, regions and countries. It considers the process of population ageing for the world as a whole, for more and less developed regions, major areas and regions as well as individual countries or areas. Demographic profiles highlighting the relevant indicators of population ageing and covering the period 1950 to 2050 are provided for each country or area.



The changing balance among age groups

As noted in chapter 1, the present and future age composition of a population evolves as a function of the past population size and distribution, and the present and future fertility and mortality rates. In countries where net migration flows are significant, the age structure is also affected by the migration history. As a result of the documented changes in fertility and mortality, the balance among age groups in the global population is changing significantly. One major expression of these changes is population ageing and the trend toward a more uniform global population distribution by broad age groups than ever registered before.


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