Source: World Bank  

Release: World Development Indicators  

Units:  Number of Years, Not Seasonally Adjusted

Frequency:  Annual

Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life.

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.DYN.LE00.IN