Hong Kong is the top country by life expectancy at birth in the world. As of 2015, life expectancy at birth in Hong Kong was 84.16 years. The top 5 countries also includes Japan, Italy, Singapore, and Switzerland.
Both sexes combined. The average number of years of life expected by a hypothetical cohort of individuals who would be subject during all their lives to the mortality rates of a given period. It is expressed as years.