I badly need data on the topic because my professor required me to make a research to make up for a major exam that I missed. I figured out asking around here will help. I hope I’m right. 
Find Rehab Info
All about Alcohol and Drug Rehab
10-Nov-2009
Voila!
I think clicking on the links below will do the trick for you. I have personally visited the sites, and I can say that they will provide you with the info that you need. Also, you may try to consult some police agents who specialize in narcotics. Good luck!
google.