剔除暂时性移民导致的效应，所有主要发达经济体的生育率到演变为1.2—2.0，其中大部分下降到了1.3到1.9之间。
Absent temporary migration-induced effects, all major developed economies have shifted to fertility rates of 1.2-2.0, with most falling between 1.3 and 1.9.