Cannabis users

The data used for this article are taken from the annual health module of the permanent life situation survey (POLS). 

In this module people are asked whether they have used cannabis in the 30 days preceding the date of the survey.
The survey question is “Have you ever used hashish or marihuana?”. People who answer yes are then asked “And have you used hashish or marihuana is the last 30 days?

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