Stress-related products and services are worth $9.4 billion, according to MarketData. Comparatively, El Salvador has an $11.4 billion GDP (Gross Domestic Product)

A generalized anxiety disorder (GAD) is an illness provoked by stress. It is much more than the normal anxiety people experience day to day, says the National Institute of Health (NIH). It's chronic and exaggerated worry and tension, even though nothing seems to provoke it. Having this disorder means always anticipating disaster, often worrying excessively about health, money, family, or work. Sometimes, though, the source of the worry is hard to pinpoint. Simply the thought of getting through the day provokes anxiety. It's diagnosed when someone spends at least 6 months worried excessively about a number of everyday problems (NIH).
According to Neurogen. Americans, less than five percent of the world population, buy one-third of anti-anxiety pills sold worldwide ($2.3 billion ).

MarketData estimates about 9.5 million Americans see a psychiatrist, psychologist or mental health clinic each year for stress-related disorders at a cost of $6.6 billion.
It's more than that: 80% of health care is spent on stress-related disorders, according to the Centers for Disease Control in Atlanta.