Population Pyramid & Demographic Model

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Population Pyramids by Gayle Robinson

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Presentation transcript:

Population Pyramid & Demographic Model

Population Pyramid: Stage 1 Expansive Concave sides High Birth Rate High death rate Short life expectancy Rapid fall in each upward age group due to high DR

Population Pyramid: Stage 2 Expansive Straight sides Still high birth rate Falling death rate Slightly longer life expectancy Fall in DR so more people living into middle age

Population Pyramid: Stage 3 Stationary Convex sides Declining birth rate Low death rate Long life expectancy An increasing proportion of the population is in the 65+ age group

Population Pyramid: Stage 4/5 Contractive Convex sides Very low birth rate Low death rate Longer life expectancy Higher dependency ratio

Demographic Transitional Model

Demographic Transition model Compared to Population Pyramid