Question

Difficulty: MediumPopulation Concepts and Growth Dynamics

In a municipality located in West Africa with an estimated mid-year population of 250000250{}000, a demographic survey recorded 62506{}250 live births and 25002{}500 deaths within a single year. What is the Rate of Natural Increase (RNI) of this population expressed as a percentage?

Answer: 1.5 %

Answer

The Rate of Natural Increase (RNI) of the population is 1.5%1.5\%.
The Rate of Natural Increase (RNI) measures the surplus of births over deaths in a population over a specific period. Subtracting annual deaths (25002{}500) from annual live births (62506{}250) yields a natural increase of 37503{}750. Dividing this increase by the total population (250000250{}000) gives 0.0150.015, which equals 1.5%1.5\% when multiplied by 100100.

Step-by-Step Solution

1
Calculate the net natural increase in population.
Net natural increase = 37503{}750 individuals.
Natural increase measures population growth resulting solely from natural demographic events (live births minus deaths).
2
Express the natural increase as a percentage of the mid-year population.
RNI = 1.5%1.5\%.
Dividing the natural increase (37503{}750) by the total mid-year population (250000250{}000) and multiplying by 100100 converts the absolute increase into an annual growth percentage.

Key Concept

Rate of Natural Increase (RNI)
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