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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.
That is the case for every country in the world except the 18 countries designated as "demographic outliers" by the United Nations. [2] [failed verification] The aged population is currently at its highest level in human history. [3] The UN predicts the rate of population ageing in the 21st century will exceed that of the previous century. [3]
The Chinese municipality of Chongqing, which is the largest city proper in the world by population, comprises a huge administrative area of 82,403 km 2, around the size of Austria. However, more than 70% of its 30-million population are agricultural workers living in a rural setting .
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 .
This list is based on the data from the previous paragraph table. It excludes countries with only one city above one million inhabitants. Country Number of cities 1 China: 130 2 India: 50 3 Russia: 16 4 Brazil: 15 5 Indonesia: 14 6 Japan: 12 7 South Korea: 11 8 Philippines: 10 Mexico: 10 Pakistan: 10 Turkey: 10 12 United States: 9 13 Iran: 8
The total dependency ratio is the total numbers of the children (ages 0–14) and elderly (ages 65+) populations per 100 people of adults (ages 15–64). A high total dependency ratio indicates that the adult population and the overall economy face a greater burden to support and provide social services for youth and elderly persons, who are often economically dependent.
List of countries; Cities portal; ... 2005 city population estimates for the world This page was last edited on 13 September 2024, at 00:24 (UTC). Text is ...
El Alto in Bolivia is the highest-altitude city in the world. This list of the highest cities in the world includes only cities with a population greater than 100,000 inhabitants and an average height above sea level over 2,000 metres (6,600 ft).