Less developed countries has Expansive population profile are
used to describe populations that are young and growing. They are often
characterized by
their typical ‘pyramid’ shape, which has a broad base and narrow top.
Expansive population pyramids show a larger percentage of the population in the
younger age cohorts, usually with each age cohort smaller in size than the one
below it.
While the highly industrialized nation has Constrictive
population pyramids are used to describe populations that are elderly and
shrinking. Constrictive pyramids have smaller percentages of people in
the younger age cohorts and are typically characteristic of countries with
higher levels of social and economic development, where access to quality
education and health care is available to a large portion of the population.