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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.
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.
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.
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 UN's first report in 1951 showed that during the period 1950–55 the crude birth rate was 36.9/1,000 population and the crude death rate was 19.1/1,000. By the period 2015–20, both numbers had dropped significantly to 18.5/1,000 for the crude birth rate and 7.5/1,000 for the crude death rate.
The world population more than tripled during the 20th century from about 1.65 billion in 1900 to 5.97 billion in 1999. [16] [17] [18] It reached the 2 billion mark in 1927, the 3 billion mark in 1960, 4 billion in 1974, and 5 billion in 1987. [19] The overall population of the world is approximately 8 billion as of November 2022.
A chart of changes in world population growth rate from 1950–2010 (red) and predicted changes in world population growth rate from 2010–2050 (blue). The original was created 6 Dec 2003 by Securiger from data provided by the U.S. Census Bureau. Converted to SVG by Conscious.
"World Population Prospects 2022 Demographic indicators by region, subregion and country, annually for 1950-2100" (XLS (91MB)). United Nations Population Division. 27 (Online ed.). New York: United Nations Department of Economic and Social Affairs, Population Division. rows 7870:7941, cols X,AE,S,AH,S. Archived from the original on 2022-08-09.