In 2006 life expectancy in the United States was 757 for whi

In 2006, life expectancy in the United States was 75.7 for white males, 80.6 for white females, 69.7 for black males, and 76.5 for black females. Who is credited for developing the life table, which is a tool for calculating life expectancy?

John Graunt in 17th century is credited for developin life table for the first time in London.