DEMOGRAPHIC
TRANSITION: AGE-SEX
PYRAMIDS
PROFESSOR RODDY FOX
[email protected]
[email protected]
1
AGE-SEX PYRAMID: SWEDEN
Statistics Sweden has an excellent animated age-sex
pyramid: http://www.scb.se/Statistik/BE/BE0101/
_bilder/befpyramid_20100817.swf
Population pyramids are constructed like bar charts
http://vcampus.uom.ac.mu/soci1101/642the_age_sex_pyramid.html
200 YEARS OF POPULATION
(WITH ENGLISH TRANSLATIONS)
A Typical Expansive Pyramid up to 1867
1867-9
Constrictive
1920-21
A Typical Constrictive Pyramid
A Typical Stationary (or near Stationary) Pyramid
EXPANSIVE population pyramids show larger numbers or
percentages of the population in the younger age groups. These
types of pyramids are usually found in populations with very large
fertility rates and lower than average life expectancies. The age-sex
distributions of many developing countries would probably display
expansive population pyramids.
CONSTRICTIVE population pyramids display lower numbers or
percentages of younger people eg United States of America.
STATIONARY or near-stationary population pyramids display equal
numbers or percentages for almost all age groups, though smaller
figures are still to be expected at the oldest age groups. The agesex distributions of Scandinavian countries will tend to fall into this
category.
Populations that have changed
from Expansive, through
Constrictive to Stationary AgeSex Distributions have usually
passed through the
Demographic Transition
•
•
Life expectancy in Sweden 1751-1790 (Crude Birth Rate and
Crude Death Rate approx. 30)
•
At birth: 33.72 (male), 36.64 (female)
•
At age 50: 18.16 (male), 19.59 (female)
•
At age 65: 10.02 (male), 10.51 (female)
Life Expectancy in Sweden 2004 (Crude Birth Rate and Crude
Death Rate approx. 10)
•
At birth: 78.35 (male), 82.68 (female)
•
At age 50: 30.19 (male), 33.92 (female)
•
At age 65: 17.39 (male), 20.56 (female)