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DTM and Population Pyramids
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DTM and Population Pyramids


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  • 1. Population
  • 2. Net Migration RateImmigration rate (people arriving in Canada)Emigration rate (people leaving Canada)NET MIGRATION RATE
  • 3. Population Growth RateBirth Rate Death Rate Net Migration Rate POPULATION GROWTH RATE
  • 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. Demographic Transition Model• Outlines natural stages of growth and development• Demographer tool to analyze and understand population numbers and change
  • 6. Demographic Transition Graph
  • 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. Demographic Transition Model• Stage 2- High birth, low death= population explosion – Medical & scientific advances • Vaccines, drinking water, sewage systems • 1800s
  • 9. Demographic Transition Model• Stage 3- low death, declining birth – Social programs, industrialization, urbanization= smaller families
  • 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. Demographic Transition Model• Stage 5- birth rate lower than death rate • Future, however some European nations and Japan starting to enter this stage
  • 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. P. Pyramids- Early Expanding1) EARLY EXPANDING- Wide base= high birth rate- Narrow top= short life expectancy*few countries today fall in this category
  • 14. P. Pyramids- Expanding2) EXPANDING- Wide base= high birth rates- Middle expands= improved medical care, modern hygiene, improved diet
  • 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. 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. P. Pyramids- Early ExpandingNigeria, 2005
  • 18. Early ExpandingScotland, 1861
  • 19. P. Pyramids- Early Expanding
  • 20. P. Pyramids- Expanding
  • 21. P. Pyramids- Expanding
  • 22. P. Pyramids- Stable
  • 23. P. Pyramids- Stable
  • 24. P. Pyramids- Contracting
  • 25. BC- 1996
  • 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. 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. 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. Canadian StatsEstimated that by 2041- 23% population 65+- Affects government spending (healthcare) & immigration ratesConclusions: Entering DTM Stage Four, Stabalizing
  • 30. P. Pyramids- Stable
  • 31. So whatSome countries are overpopulated, while others are depopulating. How does this happen?