2: South Korea

South Korea has one of the lowest unemployment rates and fastest growing economies in the world, with a current rate of unemployment of just 3.5 percent. This is still considered above average for this country, which is matched only by Switzerland in its extraordinarily low unemployment rate.

Its strong economic performance may require the country to accept additional immigrants into the country to fuel the economy in the future. South Korea has experienced a low number of births in recent years while keeping net immigration at zero, so continued economic growth may depend on further increasing the population.