September 5, 2012

Field Listing - Sex ratio:

This section includes the number of males for each female in five age groups - at birth, under 15 years, 15-64 years, 65 years and over, and for the total population. Sex ratio at birth has recently emerged as an indicator of certain kinds of sex discrimination in some countries. For instance, high sex ratios at birth in some Asian countries are now attributed to sex-selective abortion and infanticide due to a strong preference for sons. This will affect future marriage patterns and fertility patterns. Eventually, it could cause unrest among young adult males who are unable to find partners.

Source: UN Statistics Division, Department of Economic and Social Affairs. "World Population Prospects: The 2010 Revision".

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Population Pyramids show the distribution of inhabitants by age and gender, which can be projected with remarkable accuracy far out in the future.

 

Above is a series of population pyramids for the United States, the European Union, China and India, they show the 2010 population distribution and the 2050 distribution, barring unpredictable events.

 

The population pyramid on the left reflect China's dstribution as of 2013.

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