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Demographic Transition and Geography - Reading Development from Birth Rates

(Updated: 2025-03-20)

4 min read

Key Insight: Extreme Fertility Rates Powerfully Narrow Countries

World total fertility rates vary 10-fold. Lowest: South Korea (0.7). Highest: Niger (7.0). Only Korea is below 1.0. Only Niger, Somalia, Chad, DR Congo, and Mali exceed 6.0. Extreme values narrow to just a few countries.

Geographic Patterns of Fertility

High fertility (TFR 5.0+) concentrates in Sub-Saharan Africa. Medium (2.0-3.0): South Asia, Southeast Asia, parts of Middle East. Low (below 1.5): East Asia (Japan 1.2, Korea 0.7, China 1.0), Southern Europe (Italy 1.2, Spain 1.2), Eastern Europe.

Aging Rate Identification

Highest 65+ share: Japan (29%), Italy (24%), Finland (23%), Portugal (23%). 'World's most aged country' means Japan. Countries below 3% aging are Sub-Saharan African high-fertility nations.

Population Pyramid Shapes

Expansive (wide base): African high-fertility countries. Stationary (bell): middle-income like USA, Brazil. Constrictive (narrow base): aging nations like Japan, Korea, Germany. 'Constrictive pyramid' narrows to East Asian or Southern European developed nations.

Next Steps

Memorize: 'extremely high fertility = Sub-Saharan Africa,' 'extremely low = East Asia/Southern Europe,' 'highest aging = Japan.' Study with our Population Ranking article for systematic demographic knowledge.

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