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Youth Dependency Ratio Definition: population ages divided by the population ages The population is stable, neither increasing nor decreasing. All three ratios are commonly multiplied by Example: United States Stationary - with a somewhat equal proportion of the population in each age group. Higher values indicate a greater level of dependency. Example: Nigera Population Pyramid Constrictive - pyramid with a narrow base lower percentage of younger people, indicating declining birth rates with each succeeding age group getting smaller than the previous one.

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