Show the proportion of the population (or of each sex) at each age level.
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Transcript of Show the proportion of the population (or of each sex) at each age level.
![Page 1: Show the proportion of the population (or of each sex) at each age level.](https://reader035.fdocuments.us/reader035/viewer/2022071807/56649ebf5503460f94bc99c3/html5/thumbnails/1.jpg)
3.1.3 AGE SEX PYRAMIDS
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AGE/SEX PYRAMIDS
Show the proportion of
the population (or of each sex) at each age
level.
![Page 3: Show the proportion of the population (or of each sex) at each age level.](https://reader035.fdocuments.us/reader035/viewer/2022071807/56649ebf5503460f94bc99c3/html5/thumbnails/3.jpg)
Demographer usually plot % or # of male and females in the total population in each of three categories:
1. Pre-reproductive (0-14)2. Reproductive (15-44)3. Post-reproductive (45 and up)Male Female
Ages 0-14 Ages 15-44 Ages 45-85+
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HOW DOES AGE STRUCTURE AFFECT POPULATION GROWTH?
Age/Sex Pyramids help demographers determine the potential for future growth of a specific age group as well as that of the total population .
The overall shape of the pyramid indicates potential growth.
Age structure diagrams not only reveal a population’s growth trends, but can point to future social conditions.
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Male Female
U.S.
Male Female
Congo
Male Female
Germany
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Why would a country’s leaders want to know the proportion of the population in different age groups?
What difference does the age of the people in a country make?
What kinds of products do young people use?
Older people? Is it important for a government
leader or planner to know the age of population they are serving?
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Male Female
Rapid GrowthGuatemala
NigeriaSaudi Arabia
Ages 0-14 Ages 15-44 Ages 45-85+
Slow GrowthUnited States
AustraliaCanada
Male Female
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Zero GrowthSpain
AustriaGreece
Male Female
Negative GrowthGermanyBulgariaSweden
Male Female
Ages 0-14 Ages 15-44 Ages 45-85+
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300 200 100 0 100 200 300
85+
80-85
75-79
70-74
65-69
60-64
55-59
50-54
45-49
40-44
35-39
30-34
25-29
20-24
15-19
10-14
5-9
0-4
Male Female
Population (millions)
Ag
e
Developing Countries
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300 200 100 0 100 200 300
85+
80-85
75-79
70-74
65-69
60-64
55-59
50-54
45-49
40-44
35-39
30-34
25-29
20-24
15-19
10-14
5-9
0-4
Male Female
Population (millions)
Ag
e
Developed Countries
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Fig. 46.15, p. 827
CANADA UNITED STATES
INDIA AUSTRALIA
MEXICO CHINA
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AGE STRUCTURE DIAGRAM U.S.