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POPULATION PYRAMIDS

POPULATION PYRAMID

• A graph that depicts population distribution by age and sex • Youngest on the bottom, oldest on the top• Males on the left, females on the right

• These pyramids help us understand trends of a country’s population

WHAT CAN A POPULATION PYRAMID TELL US?

• Birth rate – number of births per 1,000 people• Death Rate – number of deaths per 1,000 people• Life Expectancy – average lifespan of a population• Education levels – more educated populations

have smaller families• Quality of healthcare – better healthcare

increases average lifespan• Future Needs – Retirement homes? Pensions?

Schools? Immigrants?

CANADA AS AN EXAMPLE

Canada’s Growth Rate: 0.76%

3 TYPES OF POPULATION PYRAMIDS

• Rapid Growth: When the birth rate exceeds the death rate• Steady: When the birth rate and the death rate

are about the same• Decreasing Population: When the death rate

exceeds the birth rate

RAPID GROWTH EXAMPLE

Population Growth Rate: 2.89%

STEADY POPULATION EXAMPLE

Population Growth Rate: 0.77%

DECREASING POPULATION EXAMPLE:

Population Growth Rate: - 0.18%

ST. CATHARINES POPULATION PYRAMID

Keying Sequence for % : “=B3/B21” (this will give you % for males age 0-4)

CREATING YOUR POPULATION PYRAMID

• http://www.excel-exercise.com/charts/population-pyramid/

0-45--9

10--1415-1920-2425-2930-3435-3940-4445-4950-5455-5960-6465-6970-7475-7980-84

85+

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St. Catharines Population Pyramid (2011)

% Female% Male

Population %

Age