Some in the field have been frustrated by the classification system, which focuses on behavioral symptoms and not on chemical changes or brain abnormalities.

WSJ: Revised Psychiatric Manual Faces Mixed Reviews

The numbers were combined to find an overall rating of employee happiness for each respondent, and then they were sorted by field to find the six happiest and six unhappiest industries (as defined by the North American Industry Classification System ( NAICS)).

FORBES: The Happiest And Unhappiest Industries To Work In Right Now