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11“… ratio at birth (ratio of male to female births). In cohorts born between 1980 and 2000, there were 22…”
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12“… by the case of South Korea, where child sex ratios (males to females under age 5) were the highest in Asia…”
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14“… Chinese national survey, 63% of adult males (age 15 and over) and 3.8% of adult…”
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