>she pointed out that if you look at medical data (where people tend to be fairly honest about their drug usage) pretty much everyone in the metro area under st

>she pointed out that if you look at medical data (where people tend to be fairly honest about their drug usage) pretty much everyone in the metro area under study (SF) used drugs, or at least drug use was equally prevalent in pretty much every geographical area and among all demographics. Any data on type and frequency of drug used?