#### Population dependency ratio

##### Definition

Population dependency ratio (Age dependency ratio) is the ratio of persons in the “dependent” ages (generally under age 15 and over age 64) to those in the “economically productive” ages (15-64 years) in the population. It is sometimes divided into the old-age dependency (the ratio of people aged 65 and older to those aged 15-64 years) and the child dependency (ratio of people under 15 to those aged 15-64 years).

##### Computational formula
$$PDR = \text" Pop < 15 yrs old + Pop > 65 yrs old" / \text"Pop 15 to 64 yrs old"$$
 Basic data Population Source Philippine Statistics Authority (PSA) Definition Population refers to the total number of individuals in a teritory at a specified time. It covers both national and alien, native and foreign born persons, internees, refugees and any other group physically present within the borders of a country at a specified time. In assembling national demographic statistics for publication, the basic aim has been to obtain data for the physically present (or de facto) population rather than for the legally established resident (or delure) inhabitants. Frequency of collection Every ten years Frequency of dissemination Every ten years Temporal disaggregation Annual Spatial disaggregation National/Regional/Provincial
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Economic conditions
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Demographic conditions
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Political conditions
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