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2011

Estimated (to 2011) and projected (from 2012) populations of the world and its inhabited continents. The shaded regions correspond to range of projections by the United Nations Department of Economic and Social Affairs;World Population Prospects, the 2010 Revision for example, the chart showed that the world population would reach 8 billion people between 2021 and 2035
Estimated (to 2011) and projected (from 2012) populations of the world and its inhabited continents. The shaded regions correspond to range of projections by the United Nations Department of Economic and Social Affairs;[2] for example, the chart showed that the world population would reach 8 billion people between 2021 and 2035

The Day of Seven Billion, 31 October 2011, is the day that was officially designated by the United Nations Population Fund (UNFPA) as the approximate day on which the world's population reached seven billion people.[3] United Nations Secretary General Ban Ki-moon spoke at the United Nations building in New York City on this new milestone in the size of world population and the issues that it will raise, along with promoting the UNFPA's new program named 7 Billion Actions,[4] which will seek to "build global awareness around the opportunities and challenges associated with a world of seven billion people" and inspire individuals and organizations to take action.[5] It was succeeded by the Day of Eight Billion on 15 November 2022.

Background

PopulationYearYears elapsed since
previous milestone
1 billion1804––
2 billion1927123 123
 
3 billion196033 33
 
4 billion197414 14
 
5 billion198713 13
 
6 billion199912 12
 
7 billion201112 12
 
8 billion202211 11
 
9 billion203816 16
 
World population milestones (USCB estimates)

The world had already reached a population of five billion on 11 July 1987,[6] and six billion, twelve years later on 12 October 1999.[7]

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."[8]

Choice of date

According to the United Nations Department of Economic and Social Affairs Population Division, 31 October 2011 is a symbolic date chosen based on data interpolated from its 5-year-period estimates. The estimates are based on data sources such as recent censuses, surveys, vital and population registers, and published every other year as part of its World Population Prospects.

The actual date that the world population reached 7 billion had an error margin of around 12 months owing to inaccuracies in demographic statistics, particularly in some developing countries (even the world's best censuses have 1–2% error). Assuming a 1% global error margin, the 7 billion world population could have been reached as early as 20 March 2011 or as late as 12 April 2012.[9]

However, the International Programs Division of the United States Census Bureau estimated that total world population would not reach 7 billion until sometime on 12 March 2012.[10] It also offered an estimate that differed by about three months from the UN estimate for the Day of Six Billion.[11]

The International Institute for Applied Systems Analysis estimated a date between February 2012 and July 2014.[12]

Seven billionth person

United Nations Population Fund spokesman Omar Gharzeddine said, "There's no way that the U.N. or anyone could know where or at what minute on the 31st the 7 billionth baby will be born", and that the United Nations would not be giving official status to this and similar publicity efforts.[8] Nevertheless, several newborns were selected by various groups to represent the seven billionth person.

On the Day of Seven Billion, the group Plan International symbolically marked the birth of the 7 billionth human with a ceremony in the Indian state of Uttar Pradesh where a birth certificate was presented to a newly born baby girl, Nargis Kumar,[13] in order to protest sex-selective abortion in the state. The Indian girl to boy ratio for 0–6-year-olds is at 914 girls per 1,000 boys nationwide, with Uttar Pradesh's one of the lowest at 889 girls for every thousand boys.[14]

Other babies selected include Danica May Camacho, born in the Dr. Jose Fabella Memorial Hospital, Manila, Philippines just before midnight on the eve of the Day of Seven Billion,[15] and Wattalage Muthumai, of Colombo, Sri Lanka.[16]

See also

References

  1. World Population Prospects, the 2010 Revision
  2. ↑ World Population Prospects, the 2010 Revision
  3. ↑ World Population Prospects, the 2008 Revision Frequently Asked Questions Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat updated November 10, 2010. Retrieved January 26, 2011
  4. ↑ "Day of 7 Billion". UNFPA. Retrieved October 16, 2011.
  5. ↑ "About 7 Billion Actions". 7 Billion Actions. Archived from the original on October 24, 2011. Retrieved October 16, 2011.
  6. ↑ "And Baby Makes Five Billion:U.N. Hails a Yugoslav Infant". New York Times. July 12, 1987. Retrieved October 16, 2011.
  7. ↑ Lederer, Edith (October 12, 1999). "World Population hits 6 Billion". The Washington Post. Archived from the original on September 16, 2013. Retrieved October 16, 2011.
  8. 1 2 Cosmic Log – 7 billion people? How do they know?
  9. ↑ How do we know that the world population reaches 7 billion on October 31, 2011?
  10. ↑ "World Population Clock".
  11. ↑ Brunner, Borgna. "Population hits Six Billion". infoplease.com. Retrieved October 16, 2011.
  12. ↑ Scherbov, Lutz and Sanderson, "The Uncertain Timing of Reaching 7 Billion and Peak Population", International Institute for Applied Systems Analysis, 2011 : « The distribution is highly skewed with a mode in July 2012, a median in January 2013, and a mean in April 2013. There is a 60 percent chance that the world’s population would reach 7 billion between February 2012 and July 2014. According to the United Nations, the “Day of 7 Billion” should be celebrated on 26 August 2011 ».
  13. ↑ "India welcomes 'world's seven billionth baby'". BBC News. October 31, 2011. Retrieved October 31, 2011.
  14. ↑ "Baby 7 Billion: Countdown begins for a girl in India". Reuters NewsAlert. October 14, 2011. Archived from the original on October 19, 2011. Retrieved October 16, 2011.
  15. ↑ Coleman, Jasmine (October 31, 2011). "World's 'seven billionth baby' is born". The Guardian. London. Retrieved October 31, 2011.
  16. ↑ "Seven billionth child born in SL | Caption Story". Dailymirror.lk. October 31, 2011. Retrieved October 5, 2012.


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