Wikipedia? Kerosene has fallen hook line and sinker for what they think supports their opinion. The statistics posted on Wikipedia are those that suit the opinion of the writer.
I don't supposed it occurred to you either that lifetime use (at least once in their life) is naturally increased by the death of the old who had never used it ever because it was uncommon in their youth?
Moreover from one of the reference links:
http://www.idt.pt/PT/...09_NationalReport.pdf
... the trend seems to be in the direction of a decrease, either in the number of users (prevalence) or in the intensity of use (lower level of intensive use-more than 20 times in last 12 months) among the users.
Between 2000 and 2005, the estimate number of problematic drug users in Portugal has shown a clear decline, with special relevance for injecting drug users.
Considering again cannabis use, last 12 months and last 30 days prevalence repeat the pattern found for lifetime: general decrease for [13 to 18 yo] boys and girls in almost all age groups since 2003.
Much of the success comes from diverting the fortune previously spent on enforcement into education, prevention and health. Prevention is the best cure, hence their interest in the school age population.