Variable Definition Population De facto population in a country, area or region as of 1 July of the year indicated. Figures are presented in thousands. Population density Population per square Kilometre. Urban population De facto population living in areas classified as urban according to the criteria used by each area or country. Data refer to 1 July of the year indicated and are presented in thousands. Rural population De facto population living in areas classified as rural (that is, it is the difference between the total population of a country and its urban population). Data refer to 1 July of the year indicated and are presented in thousands. Percentage urban Urban population as a percentage of the total population. Percentage rural Rural population as a percentage of the total population. Population by five-year age group and sex De facto population as of 1 July of the year indicated classified by sex (male, female, both sexes combined) and by five-year age groups (0-4, 5-9, 10-14,….., 95-99, 100+). Data are presented in thousands. Population by sex    De facto population as of 1 July of the year indicated classified by sex (male, female, both sexes combined). Data are presented in thousands. Population sex ratio Number of males per 100 females in the population. Median age Age that divides the population in two parts of equal size, that is, there are as many persons with ages above the median as there are with ages below the median. Population change Population increment over a period, that is, the difference between the population at the end of the period and that at the beginning of the period. Refers to five-year periods running from 1 July to 30 June of the initial and final years. Data are presented in thousands. Population growth rate Average exponential rate of growth of the population over a given period.  It is calculated as ln(Pt/P0)/t where t is the length of the period. It is expressed as a percentage. Rate of natural increase Crude birth rate minus the crude death rate. Represents the portion of population growth (or decline) determined exclusively by births and deaths. Crude birth rate Number of births over a given period divided by the person-years lived by the population over that period. It is expressed as number of births per 1,000 population. Crude death rate Number of deaths over a given period divided by the person-years lived by the population over that period. It is expressed as number of deaths per 1,000 population. Net reproduction rate The average number of daughters a hypothetical cohort of women would have at the end of their reproductive period if they were subject during their whole lives to the fertility rates and the mortality rates of a given period.  It is expressed as number of daughters per woman. Total fertility The average number of children a hypothetical cohort of women would have at the end of their reproductive period if they were subject during their whole lives to the fertility rates of a given period and if they were not subject to mortality. It is expressed as children per woman. Life expectancy by sex The average number of years of life expected by a hypothetical cohort of individuals who would be subject during all their lives to the mortality rates of a given period. It is expressed as years. Net migration rate The number of immigrants minus the number of emigrants over a period, divided by the person-years lived by the population of the receiving country over that period. It is expressed as net number of migrants per 1,000 population. Net migration Net number of migrants, that is, the number of immigrants minus the number of emigrants. It is expressed as thousands. Sex ratio at birth Number of male births per one female birth. Births Average annual number of births over a given period. Refers to five-year periods running from 1 July to 30 June of the initial and final years. Data are presented in thousands. Births by age group of mother Number of births over a given period classified by age group of mother (15-19, 20-24, 25-29, 30-34…..45-49). Refers to five-year periods running from 1 July to 30 June of the initial and final years. Data are presented in thousands. Age-specific fertility rates Number of births to women in a particular age group, divided by the number of women in that age group. The age groups used are: 15-19, 20-24,….45-49. The data refer to five-year periods running from 1 July to 30 June of the initial and final years. Women aged 15-49 Number of women aged 15-49 as of 1 July of the year indicated, and that number as a percentage of the total female population as of 1 July of the year indicated. The number of women is presented in thousands. Deaths by sex Number of deaths over a given period. Refers to five-year periods running from 1 July to 30 June of the initial and final years. Data are presented in thousands. Deaths under age 1 Number of deaths under age 1 over a given period. Refers to five-year periods running from 1 July to 30 June of the initial and final years. Data are presented in thousands. Deaths under age 5 Number of deaths under age 5 over a given period. Refers to five-year periods running from 1 July to 30 June of the initial and final years. Data are presented in thousands. Infant mortality Probability of dying between birth and exact age 1. It is expressed as deaths per 1,000 births. Mortality under age 5 Probability of dying between birth and exact age 5. It is expressed as deaths per 1,000 births. Dependency ratios The total dependency ratio is the ratio of the sum of the population aged 0-14 and that aged 65+ to the population aged 15-64. The child dependency ratio is the ratio of the population aged 0-14 to the population aged 15-64. The old-age dependency ratio is the ratio of the population aged 65 years or over to the population aged 15-64. All ratios are presented as number of dependants per 100 persons of working age (15-64). Population aged  0-4 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 0-14 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 5-14 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 6-11 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 12-14 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 15-17 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 18-23 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 15-24 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 15-59 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 15-64 De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 60 or over De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 65 or over De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Population aged 80 or over De facto population as of 1 July of the year indicated and in the age group indicated and the percentage it represents with respect to the total population. Population data are presented in thousands. Back to top