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Graph of world population over the past 12,000 years . As a general rule, the confidence of estimates on historical world population decreases for the more distant past. Robust population data exist only for the last two or three centuries. Until the late 18th century, few governments had ever performed an accurate census.
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.
This is a list of population milestones by country (and year first reached). Only existing countries are included, not former countries. Only existing countries are included, not former countries. 20 million milestone
In just one hundred years, the population of Brazil decupled (x10), from about 17 million in 1900, or about 1% of the world population in that year, to about 176 million in 2000, or almost 3% of the global population in the very early 21st century. Mexico's population grew from 13.6 million in 1900 to about 112 million in 2010.
Currently, 757 million humans live in the 101 largest cities; [40] these cities are home to 11% of the world's population. [40] By the end of the century, the world population is projected to grow, with estimates ranging from 6.9 billion to 13.1 billion; [40] the percentage of people living in the 101 largest cities is estimated to be 15% to 23 ...
English: World population chart, from 1800 to 2100 — showing both estimates and actual population counts. World population estimates from 1800 to 2100, based on: United Nations projections (in 2010) — "high" (colored red), "medium" (orange), and "low" (green) U.S. Census Bureau (historical estimates) — (colored black). Actual recorded ...
[citation needed] United Nations Population Fund spokesman Omar Gharzeddine disputed the date of the Day of Six Billion by stating, "The U.N. marked the '6 billionth' [person] in 1999, and then a couple of years later the Population Division itself reassessed its calculations and said, actually, no, it was in 1998." [12]
This is a list of countries showing past and future population density, ranging from 1950 to 2300, as estimated by the 2017 revision of the World Population Prospects database by the United Nations Population Division. The population density equals the number of human inhabitants per square kilometer of land area.