http://www.psychologytoday.com/blog/demystifying-psychiatry/201101/how-many-people-are-treated-depression
" Overall, about 8.7 million people in this country received treatment for depression in 2007 compared to about 6.5 million in 1997. "
In 2007, slightly less than 3 out of every 100 people in the U.S. were treated for depression.
3%的人口接受治療,
可以認為是常見病, 好比腳氣, 腎結石, ..., 這些毛病.
