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.
Birth Rate: The number of live births per 1000 people per year. Bulge of Young Male Migrants: on a population pyramid; young males move to urban areas due to push-pull factors. Census: a counting of people by the government every ten years to gather data for planning of schools, hospitals, etc. This is unreliable for a number of reasons. Child Dependency ratio: the number of children in relation to the number of working (economically active) population, usually expressed as a ratio.