As long as the definition of a 'mental illness' continues to be the result of voting by shrinks at a convention rather than provable science, the DSM books will continue to be a money-maker for the American psych industry and ignored by much of  the rest of the world.  

The International Classification of Diseases (ICD), produced by the World Health Organization (WHO) is preferred elsewhere.  

"The US National Institute of Mental Health, argues that the DSM represents an unscientific and subjective system.  There are ongoing issues concerning the validity and reliability of the diagnostic categories; the reliance on superficial symptoms; the use of artificial dividing lines between categories and from "normality"; possible cultural bias; and medicalization of human distress.  The publication of the DSM, with tightly guarded copyrights, now makes APA over $5 million a year, historically totaling over $100 million."