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Contribution of changes in parity progression ratio to first (dPPR01), second (dPPR12), and higher order births (dPPR23+) to the decline in completed cohort fertility among women born between (around) 1940 and 1955 (left-hand bars) and between 1955 and (around) 1970 (right-hand bars), by region
From Article:
Cohort fertility decline in low fertility countries: Decomposition using parity progression ratios