Hello- Thank you for asking the question here at JustAnswer. I have read what you have written and am happy to respond.
Thanks for asking this very interesting question. I have all of the information your require and more. I will first say that you should and probably know that the most widely abused drugs are legal! Nicotine and Alcohol are the most widely used and abused drugs on earth and cost tens of billions of dollars in associated illnesses.
That said, I am going to link you the National Institute of Drug Abuse that will provide all of the information and statistics your are requesting.
I trust that this information will more than answer your question.
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