Statistical Terms

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Definition	Defined as the percentage ratio of youth (age 0~14) and elderly (age 65 or over) population to working age (age 15~64) population in a given population. It is an indicator that measures the age structure of the population.
Commentary	Total dependency ratio = (Youth population + Elderly population) / Working age population (15~64) × 100 Youth dependency ratio = Youth population (0~14) / Working age population (15~64) × 100 Elderly dependency ratio = Elderly population (65 or more) / Working age population (15~64) × 100.
Source	KOSTAT (Population Projections)