Life expectancy - Country rankings:
The average for 2016 was 72.09 years.The highest value was in Hong Kong: 84.23 years and the lowest value was in Sierra Leone: 51.83 years. Below is a chart for all countries where data are available for: Life expectancy.
Life expectancy, in years, 2016
(years, Source: The World Bank, TheGlobalEconomy.com)