article on world popoulation
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The world population is the total number of humans currently living, and was estimated to have reached 7.8 billion people by March 2020. It took more than 200,000 years of human history to reach the world's population of 1 billion, and only 200 years more to reach 7 billion.
The world population has experienced steady growth since the Great Famine of 1315–1317 and the end of the Black Death in 1350, when it was near 370 million. The highest global population growth rate increased by 2.1% between 1955 and 1975 – between 1965 and 1970, with growth exceeding 1.8% per year. The growth rate declined to 1.2% between 2010 and 2015 and is projected to decline further during the 21st century. However, the global population is still increasing and is projected to reach around 10 billion in 2050 and over 11 billion in 2100.
Total annual births in the late 1980s were expected to remain essentially constant at around 139 million and at the level of 135 million as of 2011, while deaths were 56 million per year and expected to increase per year by 2040 80 million. The average age of the world's population was estimated to be 30.4 years in 2018. In mid-2019, the United Nations estimated that the world's population had reached 7,713,468,000.
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