Where are the world's happiest countries?

(CNN)Fans of Denmark must be even happier than usual: Denmark has retaken the title of "world's happiest country," knocking Switzerland into second place.

Denmark and Switzerland were closely followed by Iceland, Norway and Finland, according to the World Happiness Report Update 2016, released Wednesday in Rome by the Sustainable Development Solutions Network for the United Nations.

Denmark won the title three of the four times the report has been issued, losing to Switzerland only once.

People in Burundi are the least satisfied with their lives, according to the survey of 156 countries, but residents of Benin (153rd place), Afghanistan (154), Togo (155) and Syria (156) aren't doing much better.

The United States ranked 13th in overall happiness, lagging behind Canada (6), the Netherlands (7), New Zealand (8), Australia (9), Sweden (10), Israel (11) and Austria (12). Germany came in 16th place, while other superpowers -- the United Kingdom (23), Japan (53), Russia (56) and China (83) -- were markedly lower. - Read More 

World's happiest countries named - CNN

World Happiness Report 2016 Update Ranks Happiest Countries