Population pyramid

From Wikipedia, a free encyclopedia written in simple English for easy reading.

A population pyramid is a graph. It has two back-to-back bars. These bars show the population in groups of ages, with woman in one side and man in the other side.

The pyramids usually show the development of a country. When you look a pyramid you can see the life conditions of the country.

There are three types of population pyramids:

  • Stationary pyramid
  • Expansive pyramid
  • Constrictive pyramid