Study of demographics and population pyramid

Study of demographics

1. DEMOGRAPHY ADIL AGHA

2. Demography Science of population and mathematical knowledge of population changes and is concerned with size, structure, distribution and changes in population.

3. What we study in demography? Size: total no. Of person in that area at that time Structure: distribution of population among its age and sex grouping Distribution:arrangement of people in space at given time Change: it is growth or decline of population

4. Components of Population Growth Mortality Fertility Migration Marriage Social mobilty

5. Population Pyramid Graphic representation of population of area or country in terms of its composition by age and sex at a point in time.

6. Population Pyramid Types Triangular: broad based e.g. Pakistan Bee hive: Broad centred e.g. Singapore Rectangular: Stationary e.g. UK Uses Male to female ratio Population changes Dependency ratio can be calculated

7. Demographic cycle 1 st stage high stationary: CBR and CDR both are high 2 nd stage early expanding: CBR remains same death rate declines 3 rd stage late expanding: CBR starts declining and CDR declines further 4 th low stationary: birth rate and death rate also decrease 5 th declining stage: population starts to declines because because birth rate is lower than death rate

8. Demographics of Pakistan Population: 207774520 according to 2017 census (5 th most populous) CBR: 29.8/1000 population per year CDR: 7.5/1000 population per year IMR: 53.86 deaths /1000 live births MMR: 210 deaths/100000 live births Growth rate: 2.1%