Modern Language Association (of America) Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Â© William Collins Sons & Co. Ltd. 1979, 1986 Â© HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source
(b) Limitations of the Indicators: The dependency ratio is an approximation to the ratio of net consumers to net producers. As a proxy for that ratio, the dependency ratio suggests that children under age 15 as well as persons aged 65 or over are economically dependent. In many populations, however, people do not stop being economically active at age 65, nor is it true that all persons aged 15-64 are economically active.
It is defined by the occurrence of any of more than 20 opportunistic infections or HIV-related cancers. Age-Dependency Ratio The ratio of persons in the ages defined as dependent (under 15 years and over 64 years) to persons in the ages defined as economically productive (15-64 years) in a population. D -. Death Rate (or crude death rate) The number of deaths per 1,000 population in a given year. Demographic Transition The historical shift of birth and death rates from high to low levels in a population.