1. Population pyramids Dependency Ratio High Dependency Load
Population Profiles
Population pyramids
Dependency Ratio
High Dependency Load

2. Population Pyramids
A graph with a series of horizontal bar graphs for male and female populations placed back to back at age intervals of 5 years
Reveals the age and gender structure of the population and can provide powerful insight into types of government services that are and will be needed in a region or country
Useful to compare population structures of countries

4. Early Expanding
High Birth and death rates
Short life expectancy
Developing country

5. Expanding Rapid Increase in population High birth rate
Lowering death rate
Longer life expectancy
Developing country

6. Stable Stable or slowing population increases
Declining birth and death rate
More elderly
Developed country

7. Declining Extremely low birth and death rate High dependency ratio
Longer life expectancy
Developed country

8. Age Structure of the Population
Demographers divide the population into 3 age cohorts
Children 0-15
Working people 15-64
Adults 65 and older
This gives the dependency ratio which is the proportion that is being supported by the working age group
Formula
% of population that is Children plus % of population that is elderly divided by % of the population that is working age time 100

9. High Dependency Load
Dependency load is the percentage of a population that is younger than 15 and older than 65
Children and elderly put pressure on society for medical, educational, housing, and other services
2010 Canada has a dependency load of 31.4%
- 17.7% children and 13.7% elderly

10. Dependency Load: A Problematic Future
Developed Countries
Developing Countries
Low death and low birth rate means there is a large aging population that will need to be supported by a small working age cohort
Japan 1/3 of the population is over 65 with an extremely low birth rate for many years
Some developing countries have young dependents under age 15 making up almost half the population
Limited resources and attempts to improve development are used up caring for young children
Hard to reduce birth rate due to lack of medical srvices
Need to provide employment