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Sex ratio at birth (males per 100 females), 1981 to 2011

Sex ratio at birth is measured here as the number of male births for every 100 female births.

1981201119851990199520002005Expected biological ratio (105 males per 100 females)Expected biological ratio (105 males per 100 females)South KoreaChina

Source: Jiang et al. (2017) & NSO South Korea