3.1.3 Age Sex Pyramids

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3.1.3 AGE SEX PYRAMIDS

AGE/SEX PYRAMIDS

Show the proportion of the population

(or of each sex) at each age level.

Demographer usually plot % or # of male and females in the total population in each of three categories:

1.

2.

3.

Pre-reproductive (0-14)

Reproductive (15-44)

Post-reproductive (45 and up)

Male Female

Ages 0-14 Ages 15-44 Ages 45-85+

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.

Male Female

Male Female

Male Female

U.S.

Congo Germany

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?

Male Female

Male Female

Rapid Growth

Guatemala

Nigeria

Saudi Arabia

Ages 0-14 Ages 15-44

Slow Growth

United States

Australia

Canada

Ages 45-85+

Male Female Male Female

Zero Growth

Spain

Austria

Greece

Ages 0-14 Ages 15-44

Negative Growth

Germany

Bulgaria

Sweden

Ages 45-85+

Developing Countries

45-49

40-44

35-39

30-34

25-29

20-24

15-19

10-14

5-9

0-4

85+

80-85

75-79

70-74

65-69

60-64

55-59

50-54

300 200

Male Female

100 0 100

Population (millions)

200 300

45-49

40-44

35-39

30-34

25-29

20-24

15-19

10-14

5-9

0-4

85+

80-85

75-79

70-74

65-69

60-64

55-59

50-54

300

Developed Countries

200

Male Female

100 0 100

Population (millions)

200 300

CANADA

INDIA

MEXICO

UNITED STATES

AUSTRALIA

CHINA

Fig. 46.15, p. 827

AGE STRUCTURE DIAGRAM U.S.

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