POPULATION PYRAMIDS

WHAT IS A POPULATION PYRAMID?• Also called age-sex pyramid

• A graphical illustration that shows the distribution of age groups in a population

• Each 5-year age group is called a cohort

PARTS OF THE PYRAMIDY-axis: the age groups of the population (cohort groups)

X- axis: percentage (%) of the total population

Males Females

PRE-TRANSITION

High BR (“youth bulge”) High DR, slow GRLow LE

Nigeria highlights the “youth bulge”.

EARLY TRANSITION

High BR, decreasing DR, fast GRincreasing LE

LATE TRANSITION

Declining BR, Low DR, declining GRLong LE

POST TRANSITION

Low BR, Low DR, (“aging population”)slow/negative GR, Long LE

https://www.cia.gov/library/publications/the-world-factbook/geos/ja.html

DEPENDENCY LOAD

The proportion of a country’s population that is typically not in the labour force.

IncludesUnder 15, and Over 65

ANALYZING A POPULATION PYRAMID

Male Population, 1961

Female Population, 1961

High DR decreases older cohorts

Lower BR during WWII and The Great Depression

High BR after WWII,Economic prosperity

WHICH STAGE IS THIS PYRAMID?

Baby Boomers1946 - 1964

What does this pyramid tell you about their history?

http://esa.un.org/wpp/population-pyramids/population-pyramids.htm

Animated Pyramids

http://www.statcan.gc.ca/kits-trousses/animat/edu06a_0000-eng.htm

WHAT DOES THIS TELL US?• Now that we have analyzed the

pyramid lets work through the questions on the bottom of your sheet together:

• Things to think about:– What affects is this population going to have on the

country?– Which areas of the economy will you need to

change in the next few years?

NOTE: look at the bulges and depression in the pyramid, try and guess which cohort will be dominant and what affect they will have on Canada

CENSUS VIDEO: CANADIAN FAMILIES THEN AND NOW

http://www.theglobeandmail.com/news/news-video/census-video-canadian-families-then-and-now/article4553135/?from=8783751

AGE & GENDER DISTRIBUTION OF THE URBAN ABORIGINAL & NON-ABORIGINAL

POPULATIONS, CANADA, 2006