In economics, geography and demography the dependency ratio is an age-population ratio of those typically not in the labor force (the dependent part) and those typically in the labor force (the productive part). It is used to measure the pressure on productive population. == World Bank 2010 Age dependency ratio by country == As of 2010 Japan and E...
the numbers of dependent children and retired persons relative to productive age groups
The ratio of dependent population (the young and the elderly) to the working age population.
The ratio of people of dependent ages (children and the elderly) to people of economically active ages.
The ratio of dependent population (the young and the elderly) to the working age population