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”。

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.

还有其它办法可以降低抚养比率，比如鼓励外国技术工人移民本国，以及改善儿童保育服务政策，从而鼓励更多的女性去工作。