Historically, developed countries have significantly lower fertility rates, generally correlated with greater wealth, education, urbanization, and other factors. ![]() įertility tends to be correlated with levels of economic development. As of 2023, the total fertility rate varied widely across the world, from 0.78 in South Korea to 6.82 in Niger. It is obtained by summing the single-year age-specific rates at a given time.
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