How common is Clinical Depression?
Not sure of actual factual stats, however a lot of people in the population in general probably suffer symptoms of a mood/psychotic disorder. But to qualify and be diagnosed with depression as a clinical condition, you would have to be exhibiting a number of symptoms. Namely persistently low mood, anxiety, distress and withdrawl, loss of interest in everyday living, and perhaps suicidal thoughts. But i would recommend consulting the professionals with this query, if you are concerned or have any anxieties about it. Good luck.