Population Structure and Composition Flashcards
Population pyramids show
Age and gender groups
Sex Ratio
of males per 100 females
Slightly more males born but women outlive men
. Eur and NA 95 males: 100 females
. World Wide 102 males: 100 females
Age Distribution
Dependency Ratio
of people too old or too young to work compared to # of people in productive years
How to find Dependency Ratio
% of pop under 15
% over 65 divided by % in between 15-65 multiplied by 100
Tells you how many dependents for every 100 workers
Age distribution continued
Graying of the population in MDC’s - more than 1/4 of all Gov’t expenditures in US, Canada, Japan, and W.Eur goes to Social Security, health care, and other programs for the elderly.
Baby Boomer cohort in US
1946-1964
Generation X
1965-1980
Population Pyramids in Transition
Rapid Growth, Slow Growth, Zero Growth, Negative Growth
Importance of population pyramid
Policy planning
Future Housing Estates
Future schools
Future Jobs
Comparison with other countries
develope (US) vs developing (India)