Source: World Bank  

Release: World Development Indicators  

Units:  Percent of Working-Age Population, Not Seasonally Adjusted

Frequency:  Annual

Notes:

Age dependency ratio, old, is the ratio of older dependents (people older than 64) to the working-age population (those ages 15-64). Data are shown as the proportion of dependents per 100 working-age population.

Nations that are included in this data series are listed at http://data.worldbank.org/about/country-and-lending-groups. A developing nation is defined as one which falls within the lower or middle income bracket.

Source Indicator: SP.POP.DPND.OL