What is the Average Life Expectancy by Country

As we grow more advanced as a society, it should come as no surprise that life expectancy is steadily increasing across the world. Even if the gap of developed and undeveloped countries is starting to grow smaller, there are still some countries that live much longer than the rest of the world on average. What are these countries doing differently? How do people in these countries increase their longevity and how can you mimic it?