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The population pyramid displays the age and sex structure of a country or given area - PowerPoint PPT Presentation


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OLD DEPENDANTS ECONOMICALLY ACTIVE YOUNG DEPENDANTS. Population in Five Year Age bands. FEMALES To the right. MALES To the left. The population pyramid displays the age and sex structure of a country or given area. Usually, but not always, in % to make for easier comparisons

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Presentation Transcript
slide2

OLD DEPENDANTS

ECONOMICALLY

ACTIVE

YOUNG

DEPENDANTS

Population in

Five Year

Age bands

FEMALES

To the right

MALES

To the left

The population pyramid displays the age

and sex structure of a country or given area

Usually, but not always,

in % to make for easier

comparisons

between countries

shape of the sides shows death rate concave sides high death rate convex sides low death rate
Shape of the sides shows death rate:concave sides=high death rateconvex sides=low death rate

Angola

Israel

mexico s other pyramids left 1980 right 2010
Mexico’s “other” pyramidsleft: 1980 right: 2010

Concave to convex=death rates falling(this is Mexico entering what DTM stage?)

slide8

Base narrowing=falling birth rates(The first two pyramids shows South Korea moving through what stages of the DTM?)What stage does the last pyramid show?

slide10
Irregularities or “kinks” in the sides indicate some demographic anomaly that caused rapid birth or death rates.

India (not kinky)

Russia (kinky)

canada had an even more pronounced baby boom after wwii than the u s
Canada had an even more pronounced baby boom after WWII than the U.S.

Note when the baby boomers reached reproductive age they created a baby “boomlet”.

slide16

WWI + Russian Civil War

Stalin Famines

WWII

WWII “echo” and Urbanization

Echo of the echo

Declining TFR

slide18

Mao: “strength in numbers”

“Great Leap Forward”

One Child Policy

slide20

Contraception is anti-Islamic

Contraception is ok after all

slide21

Population Pyramids related to the

Demographic Transition Model

Stage 1

Stage 2

Stage 3

Stage 4

IMPLICATIONS

IMPLICATIONS

IMPLICATIONS

IMPLICATIONS

Both birth rates and

Death rates are

High, so population

growth rates are

slow but population

Is usually restored

Due to high birth

Rate. Short life

Expectancy

EXAMPLES: Afghanistan, Ivory Coast

Population continues

to grow but at slower

rate. Low C Death Rate.

Dramatically declining

Crude Birth Rate.

EXAMPLES: Ireland, China, New Zealand

Low Crude Birth Rate

and Crude Death Rate

Higher dependency ratio

and longer life expectancy

Crude Death Rate does

Rise slightly because of

The ageing population

EXAMPLES: United States, Japan

Population starts

to grow at an

exponential rate due to fall in Crude Death Rate. More living In middle age.

Life expectancy rises

Infant mortality rate falls.

EXAMPLES: Jordan, Thailand

There is some merit in including or considering

a Stage 5 today with a declining population

slide22

Shape: classic pyramidCape Verde: stage 2 in DTMBecause of mid-20th century famines, Cape Verde was one of last countries on earth to enter stage 2.

slide23

Shape: half ellipseChile: stage 3 in DTMChile moved into stage 2 (lowered death rates) in 1930’s and stage 3 (lowered birth rates due to family planning policies and bad economy) in the 1960’s

slide24

Shape: chimneyDenmark: stage 4 in DTMDenmark has been in stage 4 showing little population growth since the 1970’s.

slide30

The two “billionaires”:China has suffered more cataclysmic demographic events than India. But looking past the “kinks”, what shape is China’s pyramid trending towards?

slide31

Now it’s your turn:1) Working with a partner, analyze the 12 population pyramids on the back of your handout.2) In the table provided, match the letter below the pyramid with the region or place it describes.