Change in attitudes among 15- to 16-year-olds behind decline, though UK tops Europe's cocaine league, says drug agencyCannabis use among teenagers has continued to decline in the UK owing to a change in attitudes in the current generation of school students, according to the annual survey from the European drug agency.But Britain has retained its position in top spot for cocaine consumption with 5% of young adults aged 15 to 24 reporting that they have used the drug in the past year.The annual survey by the European monitoring centre for drugs and drug addiction says that in the early to mid-1990s, Britain stood out in Europe as reporting the highest the use of cannabis among 15- to 16-year-olds. At its ...