Natural Increase

Natural increase is the difference between the number of persons added to a population due to births over a given time period (e.g., 5 or 10 years) minus the number of persons who leave a population due to death.

It is expressed as an increase or a decrease per 1,000 population of the area at the start of the time period.

NATURAL INCREASE = BIRTHS - DEATHS

RATE OF NATURAL INCREASE = [(BIRTHS - DEATHS) / POPULATION] * 1,000

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