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In many early attempts, such as in Ancient Egypt and the Persian Empire, the focus was on counting merely a subset of the population for purposes of taxation or military service. [2] Published estimates for the 1st century (" AD 1 ") suggest uncertainty of the order of 50% (estimates range between 150 and 330 million).
Africa is the second most populated continent, with around 1.34 billion people, or 17% of the world's population. Europe's 747 million people make up 10% of the world's population as of 2020,while the Latin American and Caribbean regions are home to around 653 million (8%).
With M = 365 days in a year, the average number of people required to find a pair with the same birthday is n = 1 + Q(M) ≈ 24.61659, somewhat more than 23, the number required for a 50% chance. In the best case, two people will suffice; at worst, the maximum possible number of M + 1 = 366 people is needed; but on average, only 25 people are ...
The United Nations estimated an annual population increase of 1.14% for the year of 2000. [12] The current world population growth is approximately 1.09%. [5] People under 15 years of age made up over a quarter of the world population (25.18%), and people age 65 and over made up nearly ten percent (9.69%) in 2021. [5]
Statistical subregions as defined by the United Nations Statistics Division [1]. This is the list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects.
Population growth rate (2023, Our World in Data) [1] Absolute increase in global human population per year [2] Population growth is the increase in the number of people in a population or dispersed group. The global population has grown from 1 billion in 1800 to 8.2 billion in 2025. [3]
This table counts the number of people who got legal residence status by country of the world in the 2021 & 2022 fiscal years based on which country they last resided in. Does not include the United States. This table is not based on age or sex. Includes those who are "lawful permanent residents" only in this table. Source: [6]
Around a million people legally immigrated to the United States per year in the 1990s, up from 250,000 per year in the 1950s. [44] In 1900, non-Hispanic whites comprised almost 97% of the population of the 10 largest U.S. cities. [45]