Page 61 - Niên giám 2021

EXPLANATION OF TERMINOLOGY, CONTENT
AND CALCULATION METHODOLOGY OF SOME
STATISTICAL INDICATORS ON POPULATION AND LABOUR

POPULATION
Average population is the number of people on average for an entire
period (usually a solar calendar year), calculated by the following formula:

rt
Pt = P0 × e
In which:
- Pt: Average population of calculated year;
- P0: Base year population;

- e: Natural logarithm, e = 2.71828;
- r: Population growth rate between the calculated time as compared to

the base time;
- t: Time duration from base time to calculated time (Number of
calculated years).

Urban population is the population of the territorial units which is
designated as urban areas by the State (wards, town).

Rural population is the population of the territorial units which is
designated as rural areas by the State (communes).
Population density is the average number of people per square kilometer
of the territorial area, calculated by dividing the population (time point or
average) of a certain residential area to the area of that territory. Population
density can be calculated for each province, district, commune, etc. to reflect the
population distribution by geography at a given time.

Population density = Population (persons)
2
(persons/km ) Territorial area (km )
2
Sex ratio of the population reflects number of males per 100 females.
Sex ratio of the population is determined by the following formula:

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