According to the US Central Intelligence Agency, as of 2017, the population of which nation had the longest average life expectancy?

The Central Intelligence Agency considers life expectancy to be a reliable indicator of the overall quality of life in a country. Life expectancy is the number of years that a group of people—in this instance, the population of a nation—can be expected to remain alive. It is calculated from birth to death and is an average of the statistics of all people born in that country during that year. The agency also takes into consideration whether the mortality rate for the group stays constant at each age, into the future.

The people of the tiny European country of Monaco have the world’s longest life expectancy, 89.40 years. The Japanese can also expect a long life, with the second-highest expectancy, 85.30 years, which, unfortunately for them, is 4.10 years shorter than that of the folks in Monaco.

Countries with life expectancies of at least 82.00 years are Singapore, Macau, San Marino, Iceland, Hong Kong, Andorra, Guernsey, Switzerland, South Korea, Israel, Luxembourg, Australia, Italy, and Sweden, in places 3 through 16.

The United Kingdom comes in at number 34, with 80.80 years of expected life. People of the United States can expect 80.00 years, at number 43, while folks in Puerto Rico can expect to live to 80.90, in 32nd place.

For comparison, at the other end of the life-expectancy spectrum, Chad comes in dead last on the list of 224 nations, at 50.60 years.