См. также: average annual, average attendance, average living space per person, avert
The average duration of life for the past eight presidents who died of natural causes was 81.6 years. (MarketWatch)
Lifespan is the term used to describe how long an individual lives, while life expectancy is the average duration of life that individuals in an age group can expect to have — a measure of societal wellbeing. (Huffington Post Canada)
