Conclusion:
… In contrast to the migration streams needed to offset total or working-age population decline, the levels of migration that would be needed to prevent the countries from ageing are of substantially larger magnitudes. By 2050, these larger migration flows would result in populations where the proportion of post-1995 migrants and their descendants would range between 59 per cent and 99 per cent…
www.un.org/en/development/desa/population/publications/ageing/replacement-migration.asp
h/t Tess
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