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Average life expectancy: 81.57 years

Spaniards love the Mediterranean diet even though they have made some tweaks. People in the country are very family-oriented and keep strong family and social connections throughout their lives. This contributes to both happier and longer life. Spain has seen a slight drop in happiness lately, according to the index, but it still fares well on the list at No. 37 out of 157. By 2050, more than 36 percent of the population is expected to be senior citizens, the highest proportion of any nation in Europe.