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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.
It took around 300,000 years of human prehistory and history for the human population ... comparison of the world population in past and present ... 1920s and 2000s ...
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.
1920s: The Spanish Flu. In the fall of 1918, a mutated version of the virus that claimed its first victims in the spring made its way around the world, causing the death rate to escalate quickly ...
Demographic history: Historical demography: World population estimates: List of Countries by Population 1800: 1900: 1939: ... Percentage of World Population ...
The "Day of Seven Billion" was targeted by the United States Census Bureau to be in March 2012, [15] while the Population Division of the United Nations suggested 31 October 2011, [16] and the latter date was officially designated by the United Nations Population Fund (UNFPA) as the approximate day on which the world's population reached seven ...
The current world population growth is approximately 1.09%. [7] 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. [7] The world population more than tripled during the 20th century from about 1.65 billion in 1900 to 5.97 billion in 1999.
Population of the world from 10,000 BC to 2000 AD (logarithmic scale) Estimating the ancestral population of anatomically modern humans, Colin McEvedy and Richard Jones chose bounds based on gorilla and chimpanzee population densities of 1/km 2 and 3-4/km 2, [1] respectively, then assumed that as Homo erectus moved up the food chain, they lost an order of magnitude in density.