Depression is the second leading cause of disability around the world, scientists reported Tuesday in the journal of PLOS Medicine.
The study also estimated the rate of depression in each country. And The Washington Post's Max Fisher plotted the data onto a map.
The color indicates how much of the population in each country has been diagnosed with clinical depression. Redder countries have higher depression rates. Bluer countries have lower rates.
Learn more about the study at The Washington Post.