Ethiopia Ranks 122/158 in the Happiest Countries in the World

America ranks 15th, a slight improvement over last year.

The happier countries are marked in dark green.

How happy is your homeland?

There's a new World Happiness Report out this week that ranks the most cheerful nations in the world.

Switzerland ranks No. 1, trailed by Iceland, Denmark, Norway, Canada, Finland, the Netherlands and Sweden. America ranks 15th, a slight improvement from last year. The saddest — er, least "happy" — countries include Togo, Burundi, Syria, Benin and Rwanda.

[Who Is Happier: Liberals or Conservatives?]

Data, which can be used to guide policy, is based on research collected by economists and scientist analyzing the factors that make people feel satisfied. Data points include life expectancy, freedom to make life choices and social support. 

Here's the rundown of the world's top 20 happiest countries:

You can download the full report here.