GROVE 发表于 2025-3-25 03:33:01
Fertility, births per thousand of the population over a given period of time (normally a year). Such a rate is a function of three main variables: the ratio of births to women of child-bearing age; the ratio of women of child-bearing age to the total population; and the proportion of women of childbearing ageintrigue 发表于 2025-3-25 10:37:06
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