Wednesday, October 6, 2010

RNI is a positive number for every country on earth 

TFR - The sum of the age-specific birth rates of women in five-year age groups multipled by five. This rate estimates the number of children a cohort of 1,000 women would bear if they all went through their childbearing years exposed to the same age-specific birth rates in effect for a particular time.
(The average number of kids born per woman in a given population) 

The number of the total fertility rate that you would need to have in a country in order for the population to remain the same - 2.1 

TFR - US. -  2.06 

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