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World population pyramid from 1950 to projected in 2100 (UN, World Population Prospects 2017) A population pyramid (age structure diagram) or "age-sex pyramid" is a graphical illustration of the distribution of a population (typically that of a country or region of the world) by age groups and sex; it typically takes the shape of a pyramid when the population is growing. [1]
In 2006, Protestants made up 2.1% of Italy's population, and members of Eastern Orthodox churches comprised 1.2% or more than 700,000 Eastern Orthodox Christians including 180,000 Greek Orthodox, [116] 550,000 Pentecostals and Evangelists (0.8%), of whom 400,000 are members of the Assemblies of God, about 250,000 are Jehovah's Witnesses (0.4% ...
Population density (people per km 2) by country This is a list of countries and dependencies ranked by population density , sorted by inhabitants per square kilometre or square mile . The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1 .
The national 1 July, mid-year population estimates (usually based on past national censuses) supplied in these tables are given in thousands. The retrospective figures use the present-day names and world political division: for example, the table gives data for each of the 15 republics of the former Soviet Union, as if they had already been independent in 1950.
Human population projections are attempts to extrapolate how human populations will change in the future. [2] These projections are an important input to forecasts of the population's impact on this planet and humanity's future well-being. [3] Models of population growth take trends in human development and apply projections into the future. [4]
It is the only index associated with the age distribution of a population. [ 1 ] Currently, the median age ranges from a low of about 18 or less in most Least Developed countries to 40 or more in most European countries, Canada , Cuba , Hong Kong , Japan , South Korea , Taiwan , and Thailand .
The total dependency ratio is the total numbers of the children (ages 0–14) and elderly (ages 65+) populations per 100 people of adults (ages 15–64). A high total dependency ratio indicates that the adult population and the overall economy face a greater burden to support and provide social services for youth and elderly persons, who are often economically dependent.
Own work, data taken from UN World Population Prospects Data Portal. NOTE: This file has important statistical clarifications attached, please see description for more information. NOTE: This file has important statistical clarifications attached, please see description for more information.