According to one of the latest studies conducted by the researchers of World Health Organization, in comparison to lower-income countries, prosperous countries are more prone of having a higher rate of depression.

For conducting this study, the researchers had face-to-face interviews with nationally representative samples of people in 18 countries of five continents. They approximately surveyed 90,000 people in all and with the help of a standardized list based on nine criteria, assessed their entire history of depression.

Based on age and relationship status these surveyed people were classified into different groups but before this, they were divided into groups based upon the average household earnings of every country. Two major groups were made-High and middle-to-low income groups.

Based on the stats of this survey, the high income nations have 15% population either still suffering from depression else they had sometime suffered from an episode of clinical depression in their lifetime; whereas on the other hand, in low-income nations, this percentage was only 11%.

France with 21% and the United States with 19% had the highest rates of depression, while China with 6.5% and Mexico with 8% had the lowest.