DTM and Population Pyramids


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DTM and Population Pyramids

  1. 1. Population
  2. 2. Net Migration RateImmigration rate (people arriving in Canada)Emigration rate (people leaving Canada)NET MIGRATION RATE
  3. 3. Population Growth RateBirth Rate Death Rate Net Migration Rate POPULATION GROWTH RATE
  4. 4. Doubling TimeDoubling time= time it takes for a population to double 70 =number of years for population to% rate of population growth double
  5. 5. Demographic Transition Model• Outlines natural stages of growth and development• Demographer tool to analyze and understand population numbers and change
  6. 6. Demographic Transition Graph
  7. 7. Demographic Transition Model• Stage 1- high birth, high death=small growth – High infant mortality – Low life expectancy – Common a few hundred years ago, and in developing countries today
  8. 8. Demographic Transition Model• Stage 2- High birth, low death= population explosion – Medical & scientific advances • Vaccines, drinking water, sewage systems • 1800s
  9. 9. Demographic Transition Model• Stage 3- low death, declining birth – Social programs, industrialization, urbanization= smaller families
  10. 10. Demographic Transition Model• Stage 4- low birth, low death=slow population growth – Changing role of women Lower birth rates – Family planning programs – Some African countries, birth rates still high – Sub-Saharan Africa- HIV= high death
  11. 11. Demographic Transition Model• Stage 5- birth rate lower than death rate • Future, however some European nations and Japan starting to enter this stage
  12. 12. Population Pyramids• Analyze individual region population growth development trends• Data organized in cohort groups• Another demographer tool• Created by graphing a series of horizontal bar graph lives at intervals of 5 years• Shape- demographer classifies pyramid into four major categores
  13. 13. P. Pyramids- Early Expanding1) EARLY EXPANDING- Wide base= high birth rate- Narrow top= short life expectancy*few countries today fall in this category
  14. 14. P. Pyramids- Expanding2) EXPANDING- Wide base= high birth rates- Middle expands= improved medical care, modern hygiene, improved diet
  15. 15. P. Pyramids- Stable3) STABLE- Birth rate falls= changing attitude towards family (Education programs, changing societal attitudes, economic factors)- Death rate lowered= improved medical care
  16. 16. P. Pyramids- Contracting4) Contracting- Very low birth rate= women in work force, child-rearing is expensive, contraception, state encourages small families- Death rate continues to decrease- Life expectancy increases
  17. 17. P. Pyramids- Early ExpandingNigeria, 2005
  18. 18. Early ExpandingScotland, 1861
  19. 19. P. Pyramids- Early Expanding
  20. 20. P. Pyramids- Expanding
  21. 21. P. Pyramids- Expanding
  22. 22. P. Pyramids- Stable
  23. 23. P. Pyramids- Stable
  24. 24. P. Pyramids- Contracting
  25. 25. BC- 1996
  26. 26. Developing/Developed RegionsDeveloping regions: historically uneven economic and population growth levels Early expanding and expanding p.pyramidsDeveloped regions: relatively wealthy and stable in economic growth Stable & contracting p.pyramids
  27. 27. DependencyDependency: measure of the population of people who are too old or too young to work - require governmental supportDependency ratio:% of young dependents + % of old dependents divided by the percentage of people aged 15- 64
  28. 28. Canada’s Stats2011- EstimationsPopulation Growth Rate: approximately .8%Age structure: 0-14 years: 15.7% (male 2,736,737/female 2,602,342) 15-64 years: 68.5% (male 11,776,611/female 11,517,972) 65 years and over: 15.9% (male 2,372,356/female 3,024,571) (2011 est.)
  29. 29. Canadian StatsEstimated that by 2041- 23% population 65+- Affects government spending (healthcare) & immigration ratesConclusions: Entering DTM Stage Four, Stabalizing
  30. 30. P. Pyramids- Stable
  31. 31. So whatSome countries are overpopulated, while others are depopulating. How does this happen?