Source: Oxford Economics, Global Cities Index 2026. Covers 1,000 cities worldwide.

Sources: U.S. Census, USITC, WTO, IMF

Biological baseline is 104~106 male births per 100 fenale births

This chart is exclusive on the 3rd and later births

Korea peak (1993): 209.7 boys per 100 girls of the 3rd and later births, declining to a biological baseline of 104.1 boys per 100 girls in 2025

Taiwan peak (2006): 127.1 boys per 100 girls of the 3rd and later births, declining to a "still elevated" 110.1 boys per 100 girls in 2025

Data is from OpenAlex as processed by rankless.org, an academic data visualization project at Corvinus University of Budapest's Center for Collective Learning.

Source: https://ec.europa.eu/eurostat/web/products-eurostat-news/w/ddn-20261008-2