The table below presents the age structure of a municipal population in Nigeria obtained during a demographic survey: | Age Group (Years) | Population | | :--- | :--- | | 0 - 14 | 70,000 | | 15 - 64 | 110,000 | | 65+ | 20,000 | Based on these demographic data, what is the total age dependency ratio

The table below presents the age structure of a municipal population in Nigeria obtained d… — JAMB UTME

The table below presents the age structure of a municipal population in Nigeria obtained during a demographic survey:

Based on these demographic data, what is the total age dependency ratio of this population?

The total age dependency ratio of the population is

81.82\%

The total age dependency ratio measures the demographic burden placed on the economically active population (

15-64

years). Combining the youth population (

70,000

) and old-age population (

20,000

) gives a total dependent cohort of

90,000

. Dividing this by the working-age population (

110,000

) and multiplying by

100

yields approximately

81.82\%

Identify the dependent population cohorts

Dependent population =

70,000 \text{ (aged 0-14)} + 20,000 \text{ (aged 65+)} = 90,000

Dependents consist of individuals under 15 years old and individuals aged 65 and above.

Identify the economically active (working-age) population

Working-age population =

110,000 \text{ (aged 15-64)}

The working-age group supports the dependent population.

Apply the total age dependency ratio formula

\text{Dependency Ratio} = \left( \frac{\text{Dependent Population}}{\text{Working-Age Population}} \right) \times 100 = \left( \frac{90,000}{110,000} \right) \times 100 \approx 81.82\%

The standard demographic metric measures the ratio of dependents per 100 working-age individuals.

Age Dependency Ratio

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