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Photo Modified: Flickr / Trish Hartmann / CC BY 4.0

Average life expectancy: 89.52 years

Monaco, with a population of about 38,000, has the highest number of millionaires and billionaires per capita in the world. They can afford to eat healthy, exercise to stay fir in their 50's, and not stress about everyday issues. (Know a few tricks to handle stress at work.) Also, rich countries can spend a lot more on healthcare. Bordering the Mediterranean Sea, it’s not a surprise that the people of Monaco eat a lot of fish, fruits, and vegetablesStudies have shown that Mediterranean diet is one of the healthiest ever.