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Day 2 Cold War WestPowerPoint
http://www12.statcan.ca/english/census01/products/analytic/companion/age/cda01pymd.cfm
Expansive — a broad base, indicating a high proportion of children, a rapid rate of population growth, and a low proportion of older people.
Stable/Stationary growth — a narrow base and roughly equal numbers in each age group, tapering off at the older ages.
Declining — a high proportion of aged persons and declining numbers.