> Twenty years ago teens in Iceland were among the heaviest substance abusers in Europe — with more than 40 percent of 15- and 16-year-olds reporting being drun

> Twenty years ago teens in Iceland were among the heaviest substance abusers in Europe — with more than 40 percent of 15- and 16-year-olds reporting being drunk in a given month. > Fast forward to 2017, and the country boasts the fewest drinking, smoking and drug-taking youth on the continent. This is one metric that they are then combining with two other metrics to show...depreciation in the first? Like...yeah, that's how numbers work.