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Understanding Population Pyramids
What does it mean that Mexico’s population pyramid is very wide at the
bottom?
What does it mean that Sweden’s population pyramid is wider at the top
than Mexico’s?
What predictions can you make from these population pyramids?
Population Pyramids
http://ecp3113-01.fa01.fsu.edu/lively_introduction/fig7.gif
10 8 6 4 2 0 2 4 6 8 10
0-4 yrs.
5-9 yrs.
10-14 yrs.
15-19 yrs.
20-24 yrs
25-29 yrs
30-34 yrs.
35-39 yrs.
40-44 yrs.
45-49 yrs.
50-54 yrs.
55-59 yrs.
60-64 yrs.
65-69 yrs.
70-74 yrs.
75-79 yrs.
80+ yrs.
AGE
PERCENT
Males(%)Females(%)
Italy, 2000
1
2
34
5
Analysis of Italy’s Population Pyramid
•1. Decline in Birth Rate
•2. Baby Boom
•3. Fewer men due to World War I and II
•4. More women due to: a. longer life expectancy and b. World Wars (I and II)
•5. More 75-79 yrs than 0-4 yrs. Signs of a future worker shortage and an overall declining population.
Aging population…
…declining birth rate
10 8 6 4 2 0 2 4 6 8 10
0-4 yrs.
5-9 yrs.
10-14 yrs.
15-19 yrs.
20-24 yrs
25-29 yrs
30-34 yrs.
35-39 yrs.
40-44 yrs.
45-49 yrs.
50-54 yrs.
55-59 yrs.
60-64 yrs.
65-69 yrs.
70-74 yrs.
75-79 yrs.
80+ yrs.
AGE
PERCENT
Males(%)Females(%)
Italy, 2000
10 8 6 4 2 0 2 4 6 8 10
0-4 yrs.
5-9 yrs.
10-14 yrs.
15-19 yrs.
20-24 yrs
25-29 yrs
30-34 yrs.
35-39 yrs.
40-44 yrs.
45-49 yrs.
50-54 yrs.
55-59 yrs.
60-64 yrs.
65-69 yrs.
70-74 yrs.
75-79 yrs.
80+ yrs.
AGE
PERCENT
Males(%)Females(%)
Italy, 2025
10 8 6 4 2 0 2 4 6 8 10
0-4 yrs.
5-9 yrs.
10-14 yrs.
15-19 yrs.
20-24 yrs
25-29 yrs
30-34 yrs.
35-39 yrs.
40-44 yrs.
45-49 yrs.
50-54 yrs.
55-59 yrs.
60-64 yrs.
65-69 yrs.
70-74 yrs.
75-79 yrs.
80+ yrs.
AGE
PERCENT
Males(%)Females(%)
Italy, 2050
0-4 yrs.
5-9 yrs.
10-14 yrs.
15-19 yrs.
20-24 yrs
25-29 yrs
30-34 yrs.
35-39 yrs.
40-44 yrs.
45-49 yrs.
50-54 yrs.
55-59 yrs.
60-64 yrs.
65-69 yrs.
70-74 yrs.
75-79 yrs.
80-84 yrs.
85+ yrs.
10 8 6 4 2 0 2 4 6 8 10
Percentage
Age Livingston: Population Pyramid, 2009
Data Source: U.S. Census Bureau, International Data Base (online). How is this population pyramid different from
Italy’s?
Population Pyramids
at Different Scales• Country• State• County (Borough)
http://www.aleutianseast.org
http://dsc.discovery.com/fansites/deadliestcatch/deadliestcatch.html
ACTIVITYfor
Selected Population Pyramids in the
United States
Choices…
A. Ann Arbor, MI
B. Buffalo county, SD
C. Fort Bragg, NC
D. Leavenworth, KS
E. Manhattan, NYC
F. Nothhamton, MA
G. Punta Gorda, FL
H. Springfield, IL
Helpful Hints…
A. Ann Arbor, MI - University of Michigan
B. Buffalo county, SD - Crow Creek Indian Reservation, one of the poorest counties in the United States
C. Fort Bragg, NC - United States Army Fort
D. Leavenworth, KS - United States Penitentiary
E. Manhattan, NYC - wealthy downtown, few large families
F. Nothhamton, MA - Smith College, an all girls college
G. Punta Gorda, FL - retirement community
H. Springfield, IL - average American city
Answers
•1. B
•2. A
•3. E
•4. C
•5. G
•6. H
•7. F
•8. D
B A
E C G
H F D
Population Pyramids for
Selected Countries
Guest Workers, mainly from South Asia
http://fusions.wordpress.com/2007/08/06/migrant-workers-in-dubai
Guest Workers from India in the Persian Gulf Countries
Post War Baby Boom and Declining Birth Rate
http://www.economist.com/world/displaystory.cfm?story_id=9539825
http://kotaku.com/gaming/only-in-japan/strange-japanese-game-center-name-226261.php
Declining Birth Rate, Emigration, War
Stable Population Growth
http://www.airninja.com/worldfacts/countries/Argentina/fertilityrate.htm
Slow Decline
Extremely High Birth and Death Rates
http://www.biyokulule.com/February_%201990s(4).htm
http://www.islamic-relief.com/submenu/appeal/somalia_crisis.htm
Persistent Poverty and Violence
Constructing and Analyzing Population
Pyramids• Finding Age Sex Statistics on the
U.S. Census Web Site• Population Pyramid Construction
directions using Microsoft Excel
What will the pyramid look like in 2025? 2050?
Age Dependency
Ratio
Analysis and Evaluation for the Metropolitan Area
•With the population pyramids displayed on the wall discuss the differences between the population pyramids in different areas of the county.
•Why are there differences?
•Where in the county is it wealthy? Poor?
•Where in the county is the population the youngest? Oldest?
•How do the suburbs differ from the inner city?