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Population distribution by age and sex for Angola in 2005. 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]
Demographic transition. In demography, demographic transition is a phenomenon and theory which refers to the historical shift from high birth rates and high death rates to low birth rates and low death rates, as societies attain more technology, education (especially women) and economic development. [1] The demographic transition has occurred ...
The world population more than tripled during the 20th century from about 1.65 billion in 1900 to 5.97 billion in 1999. [15] [16] [17] It reached the 2 billion mark in 1927, the 3 billion mark in 1960, 4 billion in 1974, and 5 billion in 1987. [18] The overall population of the world is approximately 8 billion as of November 2022.
The Demography of the World Population from 1950 to 2100. Data source: United Nations — World Population Prospects 2017. Demography (from Ancient Greek δῆμος (dêmos) 'people, society' and -γραφία (-graphía) 'writing, drawing, description') [1] is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the ...
China was the world's most populous country from at least 1950 [ 4 ] until being surpassed by India by 2023. [ 5 ][ 6 ] By one estimate, in 2023 China's population stood at 1.409 billion, down from the 1.412 billion recorded in the 2020 census. [ 7 ] By another, the population was likely 1.28 billion in 2020 and had been surpassed by India some ...
The table below shows that from 2020 to 2050 and beyond to 2100, the bulk of the world's population growth is projected to take place in Africa. Of the additional 1.9 billion people projected between 2020 and 2050, 1.2 billion will be added in Africa, 0.7 billion in Asia and zero in the rest of the world.
Population. [edit] On April 1, 2020, the United States had a population of 331,449,281, according to the 2020 United States census. 38. The following demographic statistics are from the CIA World Factbook estimated as of 2018 [update], 5 unless otherwise indicated.
The population of Europe in 2015 was estimated to be 741 million according to the United Nations, [ 12 ] which was slightly less than 11% of the world population. The precise figure depends on the exact definition of the geographic extent of Europe. The population of the European Union (EU) was 509 million as of 2015. [ 13 ]