Asia is one of the world's seven continents. It is the world's most populated continent. 4,216 million people lived there in 2011, 60 per cent of the world's population.
India and China are the two most populated countries in the world, each containing nearly one fifth of the world's population. Both are located in Asia.
The population structure of a country gives information about:
It is commonly shown on a diagram called a population pyramid.
An ageing population, eg Japan, has an increasing proportion of older people (65 years and over) in the population. The population structure is becoming top-heavy.
In 2011, nearly 25 per cent of Japan's population was over 65 years old. This has increased from nearly 5 per cent in 1950. There are two main reasons for this:
Japan faces certain challenges with an ageing population. These include:
A youthful population has a high percentage of young people. For example, in 2011 36 per cent of people in the Philippines were aged 15 or younger. Only 4 per cent of people were aged 65 or above. The high percentage of people aged 15 or under is caused by:
The problems caused by a youthful population are: