There are a couple of theories about it. One is the financial crisis part of the services. Portugal did cut services pretty dramatically. That cannot help.
It is also true that the EU is open, so people can move now from all over the EU to different places. Over time, places that have liberal drug regimes may attract people who like to use drugs or like to be able to do so without any hindrance. We see that, certainly, in San Francisco. I can say that for sure. That may also have made the drug problem more complicated as people moved in to use drugs.