Population Pyramids

1
Population Pyramids

• A population pyramid is two back-to-back bar
  graphs, one showing the number of males and one
  showing females in a particular population in
  five-year age groups (also called cohorts).
• A great deal of information about the population
  broken down by age and sex can be read from a
  population pyramid, and this can shed light on
  the extent of its development.
• Birth rate trends
• Death rate trends
• Number of economic dependents (lt15, gt65)

2
In the developed countries, there are fewer and
fewer young people and more and more elderly.
Studying Population
Millions
Age
Males
Females
Source United Nations Populations Division,
World Population Prospects, The 2004 Revision.
3
The young population of the developing countries
translates to great growth potential.
Studying Population
Millions
Age
Males
Females
Source United Nations Populations Division,
World Population Prospects, The 2004 Revision.
4
Population Pyramids

• Three basic shapes of population pyramids.

5
Population Pyramids CAN 1961
Aging Population
Depression
Baby Boom
6
Canadas Population Over Time
http//www.footwork.com/pyramids.asp