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Population Pyramids. Population Pyramids. Geographers use population pyramids to learn more about a population and what services that group might need in the future They can also be used to compare populations of different countries.
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Population Pyramids • Geographers use population pyramids to learn more about a population and what services that group might need in the future • They can also be used to compare populations of different countries
The pyramid narrows toward the top. This is because the death rate is higher in older people than in younger people. In 1961 the pyramid had a wide base. These are the baby boomers, a large group of people born between 1947 and 1966 when the economy was growing.
Different Shapes of Pyramids • Expansive • A broad base, indicating a high proportion of children, a rapid rate of population growth, and a low proportion of older people. Nunavut is an example of an expansive type population pyramid. • Stable growth • A structure with indentations that even out and reflect slow growth over a period. Northwest Territories is an example of a stable type population pyramid. • Stationary • A narrow base and roughly equal numbers in each age group, tapering off at the older ages. Manitoba is an example of a stationary type population pyramid. • Declining • A high proportion of aged persons and declining numbers. Newfoundland and Labrador is an example of a declining type population pyramid.
