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He added that the amount of the decrease in life expectancy is actually less alarming than the fact that addiction and a decline in the emotional wellbeing of Americans have been significant enough to drag down the country’s average length of life. (Fortune)

There has been a four-decade increase in average length of life over the period since 1850. (The Irish Times)

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)