DEMOGRAPHIC TRANSITION MODEL

• Graphs suggesting sequence of change in relationships between birth and death rates over a period of time.
• Stage 1

  ✓ This indicates high birth rate (moderately stable) while the death rate is also high but with many fluctuations due to sporadic outbreak of diseases, famine etc.

  ✓ There is little natural increase in the population of Pakistan.

  Stage 2

  ✓ This indicates the fall of the death rate but the birth rate remains more or less at previous levels.

  ✓ The gap between the two rates widens so as a result the rate of natural increase of population peaks to its maximum.

  ✓ The percentage of the population under 15 increases.

  
• Stage 3

  ✓ This indicates a fall in the birth rate and the stabilization of the death rate.

  ✓ The growth of a city’s population slows down and the life expectancy also increases.

  Stage 4

  ✓ Both birth rates and death rates are low with the birth rate fluctuating somewhat due to changes in the economy yet the death rates remains stable.

  ✓ Population growth is slow and at the end of the stage four, the death rates rise slightly as more people become old and are more prone to die

  Stage 5

  The birth rate falls below the death rate resulting in a natural decrease in population.
• POPULATION PYRAMIDS