A 2016 report from the BBC (read it here). We can guess why. Quote: Europol estimates that around 10,000 unaccompanied children have gone missing in Europe over the past two years. The BBC World Service Inquiry programme asks why so many have disappeared. ... Some of them have been sent by their parents hoping their child would have a better chance at life ... In 2015, according to Missing Children Europe, 91% of the children who arrived in Europe on their own were boys, and 51% were from Afghanistan.