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The following list of countries by age structure sorts the countries of the world according to the age distribution of their population. The population is divided into three groups: Ages 0 to 14 years: children. Ages 15 to 64 years: working population or adults. Over the age of 65: elderly, senior citizens.
Tomiko Itooka (born 23 May 1908) of Japan is the world's oldest living person whose age has been validated. [2] João Marinho Neto (born 5 October 1912) of Brazil is the world's oldest living man whose age has been validated. [2]
It is the only index associated with the age distribution of a population. [1] Currently, the median age ranges from a low of about 18 or less in most Least Developed countries to 40 or more in most European countries, Canada, Cuba, Hong Kong, Japan, South Korea, Taiwan, and Thailand.
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.
There are challenges in comparing life expectancies across countries due to disparities in data reporting and collection standards. The primary source of the most recent data presented is the World Bank Group's 2022 report.
Within 20 years, many countries in those regions will face a situation of the largest population cohort being those over 65 and the average age approaching 50. In 2100, according to research led by the University of Washington, 2.4 billion people will be over the age of 65, compared with 1.7 billion under the age of 20. [18]
The longest lifespan for a man is that of Jiroemon Kimura of Japan (1897–2013), who lived to age 116 years and 54 days. The oldest living person in the world whose age has been validated is 116-year-old Tomiko Itooka of Japan, born 23 May 1908. [1] [2] The oldest living verified man is 112-year-old João Marinho Neto of Brazil, born 5 October ...
João Marinho Neto (born 5 October 1912) is a Brazilian supercentenarian who, at the age of 112 years, 78 days, [1] [2] [3] has been the world's oldest verified living man since the death of John Tinniswood of the United Kingdom on 25 November 2024. [4] [5] [6]