Demography pres part ii by dr najeeb (1)

BY DR: MUHAMMED NAJEEBAssist: Professor

Community Medicine Deptt: LUMHSJamshoro Sind, PAKISTANE mail [email protected]

DEMOGRAPHY

POPULATION PYRAMIDS

Pictorial presentation of 3 Factors (Influence Population)Births

DeathsMigration

Features (Population Pyramids)

In terms of its composition by:- Age, Sex Males (on Left side) Females (on Right side) Children (at bottom) Elders (at Top) Adjoining bars (contribution of each age, Sex group)

http://www.google.com.pk/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=faEBO6I6L1Tw9M&tbnid=TPN9mC15OWMkcM:&ved=0CAUQjRw&url=http://webarchive.lewishampct.nhs.uk/public_health/data_and_information/lewisham_health_profile_2004/population_characteristics&ei=hIYOUbqpH4KNtQbbvIHwAQ&bvm=bv.41867550,d.bGE&psig=AFQjCNH0tnMD7X-okz3VFXcrUnwQYjCKmA&ust=1359992749306502

Developing Country (Pakistan)

Base: Broad (High Birth rate)Top: Narrow / Acute apex (No: of Elders (Less)

High Dependency rateBad effect (on Economy) Unproductive (Half Pop) Under 15 Ys: ---- 44% Pop: B/w 15- 64 Ys: 52% Pop:

Developed Countries (Sweden)

Base: Narrow (Low Birth rate)Middle: Bulge (Convex border)Top: Obtuse apex (More Elders)

Low Dependency rateGood effect (on Economy) Productive ( More than Half Pop) Under 15 Ys: ---- 25% Pop: Above 15 Ys: ---- 75% Pop:

EXAMPLE

PAKISTAN SWEDEN

http://www.google.com.pk/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=QXeldkt9a0PFPM&tbnid=jNbWcMeLHlqCdM:&ved=0CAUQjRw&url=http://www.nationmaster.com/country/pk/Age_distribution&ei=EpkOUfb1PM3BtAab_YHgAg&psig=AFQjCNEzgqXne2cOO1rgnbAuPsU07SjtIg&ust=1359992970028716

WORLD POPULATION

http://www.google.com.pk/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=K9BJ_cPmm4Q7TM&tbnid=U2Wc_DRhC6bxXM:&ved=0CAUQjRw&url=http://www.maximizingprogress.org/2011/05/world-in-2100-future-population-pyramid.html&ei=cYcOUe_HKMfYtAadtYDwDA&bvm=bv.41867550,d.bGE&psig=AFQjCNEzgqXne2cOO1rgnbAuPsU07SjtIg&ust=1359992970028716

PAKISTAN

http://www.google.com.pk/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=SjveybEg3MP4EM&tbnid=MUkbV6UFCFKGSM:&ved=0CAUQjRw&url=http://wpolitika.wordpress.com/category/european-politics/&ei=d6AOUYjWJI3MtAbNzYHIBw&psig=AFQjCNHluc37UCsG-fw-lmRi6isyJgKcww&ust=1359999239478904

DEMOGRAPHIC CHARACTERISTICS

Population unevenly distributed with

All countries in region have a positive rate of natural population change.

very densely populated areas

very sparsely populated areas.

DEMOGRAPHIC TRANSITIONGrowth Rate (%) Grading of population

increase

0 ( Zero)

0 to 0.5

0.5 to 1

1 to 1.5

1.5 to 2.0

> 2

Stationary Growth (No Growth)

Slow Growth

Moderate Growth

Rapid Growth

Very Rapid Growth

Explosive Growth ( Population explosion) OR Population Bomb

DEMOGRAPHIC TRANSITION 3 TYPES

1. Old balance Fertility Mortality

2. New balance Fertility Mortality

3. ImbalanceFertility Mortality

India in 1920

Many countries of S. Asia & Africa

India, China,SingapurPak in 1970

Germany,Hungary

DEMOGRAPHIC CYCLE

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Demography pres part ii by dr najeeb (1)