Heroine and other opiats are not popular. In 80's situation was different ... opiats were more popular.
If this statement is true then Poland is the only country on earth to buck the trend.
When opiates, like heroin, enter a market they grow to a peak over years until 'saturation' then level off. This means the users remain around the same amount. Each death is replaced by one, rather than the 2 or 3 new addicts that have replaced every dead addict in most European countries over the last 20 years. (See Hong Kong, New York for 'saturation').
Countries that have managed to reduce the use of street heroin have done it with draconian laws (Singapore, Malaysia) or a very expensive programme of state prescribed alternatives (Switzerland). I don't mean substitutes like methadone I mean Diamorphine (Pharmaceutical heroin).
Over the next 15 years Polands wealth will grow dramatically. People will have much more disposable cash. There will be a much bigger incentive to smuggle into Poland as an actual market.
In the past it was far more profitable to continue on to Germany or Scandinavia with the contraband.