Refinement and definition of diagnostic criteria change over time. A major change in the diagnostic criteria will result in a change in the profile of the diagn

Refinement and definition of diagnostic criteria change over time. A major change in the diagnostic criteria will result in a change in the profile of the diagnoses made against a population. No malign intent nor conspiracy is required; we changed how we defined certain mental illnesses, and as a result the number and kind of diagnoses for those mental illness (and for mental health) change as professionals adopt the new standards. It's not that there's an increase or a change in the actual mental health, but just that the numbers before and after are simply not comparable.