People in Japan continue to outlive those in other countries, marking the world's longest average life expectancy of 83.7 years, according to the latest World Health Organization report released Wednesday.

The World Health Statistics 2017, covering data from 194 countries, show that the nation's life expectancy at birth has been ranked No. 1 for more than 20 years, followed by Switzerland, Singapore, Australia and Spain — with averages ranging from 82.8 to 83.4 years.

The size of the economy seemed to have little effect on a nation's longevity, with the average life expectancy in the U.S. at 79.3 years and China at 76.1.