WATCH: Helsinki locals react to Finland topping world happiness ranking

HELSINGFORS, Finland — Finland ranked as the world's happiest country for the second year running while war-torn South Sudan sank to the least contented in a United Nations report released on Wednesday.

The Nordic nation of 5.5 million people, known topped the study which used survey data asking citizens in 156 countries how happy they perceive themselves to be, as well as measures such as life expectancy, income and social support.

The other Nordic countries, as well as the Netherlands, Switzerland, Canada, New Zealand and Austria also made the top ten.

Watch how people in Helsinki react to Finland ranking as the world's happiest country for the second year running: