Sweden – 81.93
The third Scandinavian country to appear on our list, Sweden reinforces the fact that Northern Europe is one of the healthiest regions in the world. Besides having the highest water quality and the second lowest air pollution in the OECD, the Swedish diet plays a major role in such longevity. The fish, berry, and whole-grains rich diet lowers the risk of heart disease and overall helps Swedes live longer.