since the year 1950 or 60 years before the change of the population in the area, as a result of fertility more than the dead, or at the rate of migration, population growth, have been reduced.However, even though there will be a migration impact on the change of the world's population is not much, but it is expected to increase more in the development area is often a high population in the area, including Europe and North America, เซียเนียAsia, Africa and Latin America/Caribbean
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