population


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Population

glossary of terms

AGE-SPECIFIC FERTILITY RATE (ASFR) – the number of births to women of a given age group per 1,000 women in that age group. It is calculated by dividing the number of births born to women of a particular age group by the female population in that age group multiplied by 1,000.

CRUDE BIRTH RATE – the number of births per 1,000 population in a given year.

FERTILITY – the actual reproductive performance of an individual, a couple, a group, or a population.

FERTILITY RATE (General Fertility Rate) – the number of births per 1,000 women aged 15-49 years in a given year.

TOTAL FERTILITY RATE – is a fertility index combining age-specific fertility rates. It represents the average number of children that would be born to a woman throughout her lifetime given that the age-specific fertility rates still prevail at that time. It is computed using the formula TFR =5å ASFR if 5-year age groups are employed or TFR - å ASFR if single age group is employed.

GROWTH RATE – the rate at which a population is increasing (or decreasing) in a given year due to natural increase and net migration, expressed as a percentage of the base population.

HOUSEHOLD – a social unit consisting of a person living alone or a group of persons who sleep in the same housing unit and have a common arrangement in the preparation and consumption of food.

LIFE EXPECTANCY – represents the average remaining number of years for a person who survives at the beginning of a given age interval. Most commonly cited as life expectancy at birth.

LIFE EXPECTANCY AT BIRTH - the average number of years a person is expected to live from the time of his/her birth.

MIGRATION – the movement from one place to another (especially from one country to another) usually with intention to settle.

NET MIGRATION RATE – is the difference between in-migration and out-migration rates. It represents the difference between the people coming into an area and those going out of the area.

POPULATION – total number of individuals in a territory or a locality living at a specified moment of time with an agreed definition of residence; all the persons falling within the scope of a census or other inquiry.

POPULATION DENSITY – number of persons per unit of land area (square kilometer or square mile).

POPULATION DISTRIBUTION – the patterns of settlement and dispersal of a population.

POPULATION PROJECTIONS – computation of future changes in population numbers, given certain assumptions about future trends in the rates of fertility, mortality, and migration. Demographers often issue low, medium, and high projections of the same population, based on different assumptions of how these rates will change in the future.

Source: National Statistics Office (NSO)

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