I really don't know, berdie. A family member is chronically depressed, but to me his problems seem to be dealing with real life after having been overly coddled by his parents. In other words, refusing to grow up looks a lot like depression.
Many have observed how "overprescribed" anti-depressants are in the U.S., but I know from personal experience some of those are for chronic pain patients who need help getting some sleep, and not with depression problems at all.