Population

Life expectancy

The average number of years to be lived by a group of people born in the same year

 

Monco       total 89.68   men 80.57   women 93.77 

(#50)U.S.   total 78.49   men 76.05   women 81.05

Chad          total 48.69   men 47.61   women 49.82

Women live longer than men

1. Men do more dangerous work, such as police man or fire fighter

2. Women do more physical examination, they are more willing to go to the doctor. Men will not go to doctor until it's too late.

3. Diet (buy which food and go where to eat)

Average life in most African area is not long because of scanty resources, such as clean water or education system

Different areas have huge difference even many decades

Measuring population

crude birth rate : number of births per 1000 of the population

crude death rate : number of deaths per 1000 of the population

rate of natural increase (RNI)

- produced by subtracting the death rate from the birth rate

- this gives us the annual natural growth rate in percentage form - for a country or region

But don't forget about migration