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Demographic statistics are measures of the characteristics of, or changes to, a population. Records of births, deaths, marriages, immigration and emigration and a regular census of population provide information that is key to making sound decisions about national policy.
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 ...
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]
Historical demography is the quantitative study of human population in the past. It is concerned with population size, with the three basic components of population change (fertility, mortality, and migration), and with population characteristics related to those components, such as marriage, socioeconomic status, and the configuration of families.
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The template will attempt to round each percentage to a fixed number of significant digits. To override the default rounding percentage, specify the number of decimal places using |round=. For example, use |round=2 for two decimal places.
The survey combines a random sample of registered voters drawn from state voter files; self-identified registered voters using NORC’s probability based AmeriSpeak panel, which is designed to be representative of the U.S. population; and self-identified registered voters selected from nonprobability online panels.
California and Texas are the most populous states, as the mean center of U.S. population has consistently shifted westward and southward. [59] [60] New York City is the most populous city in the United States [61] and has been since at least 1790.