Life Expectancy at birth

Category	Health outcomes
Dimension	Physical Health
Description	The average number of years that a newborn could expect to live
Indicator/Index/Metrics	$e_0=\sum_{x=0}^{\infty} l_x$ $e_0$ is the life expectancy at birth. $l_x$ represents the number of people alive at age $x$ . This is derived from the life table, which starts with a hypothetical cohort (often 100,000) at birth and subtracts the number of deaths observed in each age group to calculate the number of survivors.
Note	Life expectancy at birth reflects the overall mortality level of a population. Life expectancy at birth is defined as how long, on average, a newborn can expect to live, if current death rates do not change.
Data	Health records
Ref	What does "life expectancy at birth" really mean? (worldbank.org)