I am searching for data on the prevalence of IDU in the USA, by state if possible.  Does this exist?  So far all I have been able to find is estimates from 1992-2002, and I would say the climate has changed since then. 

(Not necessarily looking for heroin use rates, as it can be used without needles and other drugs can be used with needles, etc.)

If you have any leads on this I would greatly appreciate you sharing!  Thanks.

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