1. Population Pyramids: Graphing Population Data by Age & Sex

2. Different Ages – Different Roles

3. Dependency Load Dependency Load:
% of the population under age 15 and aged 65 and over
we can see a country’s dependency load by graphing the data – population pyramid

4. 1. Population Pyramid
Allows you to graph the number of males and females in a country by age groups
We can see the % of younger & older people within the population
Uses horizontal bar graphs
Left side of graph is always male
Right side of graph is always female
Use different colours for each sex

8. 2. Canada’s Changing Population Structure
Look at Canada’s population pyramid from 1956
Why do you think Canada had a rapid population growth during this period?

9. 3. Rapid Population Growth in 1950’s
Post-WWII:
1. Many immigrants coming into the country
2. People were having moderately large families
3. Canada was in the midst of a “baby boom”
Babies born btw 1946 and 1961 are referred to as “baby boomers”

10. 4. Comparing 1956 and 2004 (pg 190)
What do you notice about the size of their dependency loads?
Both pyramids have high dependency loads, but since 1956…
% of children decreased
% of elderly increased

11. 5. Impact of High Dependency Load
In 1956:
Emphasis on providing schools for growing number of kids
In 2004:
Little need for new schools, except in some new suburban areas (Some schools are even closing down)
Those in gr. 1 in 1956 were now 54 yrs old
Need to shift Canadian society’s focus to provide services for older population
Brainstorm: How will you be affected by Canada’s dependency load (large aging population) in the future?

12. What does Canada’s aging population mean for Canadian Society
What does Canada’s aging population mean for Canadian Society? Brainstorm.
Part of Canadian Society
How Canada’s aging population will affect it:
Healthcare
Housing
The people available to work (the work force)
Job opportunities for younger Canadians
The sorts of things Canadians will want to buy

13. 4 Types of Population Pyramids
We can tell a lot from the shape of a population pyramid
Expansive — a wide base, meaning a high proportion of children, a fast rate of population growth, and a low proportion of older people.
Stable — a structure with indentations that even out and reflect slow growth over a period of time
Stationary — a narrow base and roughly equal numbers in each age group, tapering off at the older ages.
Declining — a high proportion of aged persons and declining numbers.

14. 1. Expansive (wide base) wide base: lots of children = high birth rate
high death rate
fast rate of population growth
Few older people

15. 2. Stable (wide middle) Slow growth over a period of time
High birth rate
Decreasing death rate

16. 3. Stationary (equal numbers)
a narrowing base - fewer children = drop in birth rate
roughly equal numbers in each age group, tapering off at the older ages.

17. 4. Declining (narrow base)
Birth rate declines to point where it’s close to death rate
High number of aged people
declining numbers in population

18. Case Study #1 - India

19. India 2005

20. India 2020

21. India 2050

22. Case Study #2 - Japan

23. Japan 2010

24. Japan 2020

25. Japan 2050

26. Let’s look at some population pyramids!
Canada’s population 1901 – 2001 :
Canada’s population projection 2056:
Population pyramids of different countries: