CIA Factbook: United States

Life expectancy at birth:
total population: 77.4 years
male: 74.5 years
female: 80.2 years (2002 est.)

http://www.cia.gov/cia/publications/...k/geos/us.html

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram