The number of children and retirees relative to those of working age is known as the " dependency ratio" .
未成年人口以及老龄人口总量与劳动力人口数量的比例被称为“抚养比率”。
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There are other ways to reduce the dependency ratio, such as encouraging immigration of skilled workers and improving child-care provision to encourage more women to work.
In economics, geography and demography the dependency ratio is an age-population ratio of those typically not in the labor force (the dependent part) and those typically in the labor force (the productive part). It is used to measure the pressure on productive population.