- the average numbers of years to be lived by a group of people born in the same year
- High: Monaco- (89.52 total: 85.63 men, 93.58 women
- #42 : U.S. - (79.68 total: 77.32 men, 81.97 women)
- Low: Chad- (49.81 total: 48.64 men, 51.03 women)
- crude birth rate: number of births per 1,000 of the population
- crude death rate: number of deaths per 1,000 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
Net migration Rate: the difference between the number of person's entering and leaving a country during a year
- an excess of persons entering the country is the net immigration
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