The only country in the world with significant (200+ deaths a year, more than 10,000 addicts) abuse of this chemical is Estonia, where a dose of  costs 10 €, and other opiates are not generally available since the end of the 2000s.
The sole country with considerable (over 200 fatalities annually, more than 10,000 dependents) exploitation of this substance is Estonia, where a unit cost 10 €, and other narcotics are generally not available since the beginning of the 21st century.