77% of 13-16 year olds and 38% of 9-12 year olds in the EU have a profile on a social networking site, according to a pan-European survey carried out for the European Commission. Yet, a quarter of children who use social networking sites like Facebook, Hyves, Tuenti, Nasza-Klasa SchuelerVZ, Hi5, Iwiw or Myvip say their profile is set to "public" meaning that everyone can see it, and many of these display their address and/or phone number. The figures highlight the importance of the European Commission's upcoming review of the implementation of the Safer Social Networking Principles for the EU. This agreement was brokered by the Commission in 2009 when major social networking companies agreed to implement measures to ensure the online safety of their under 18s users. Children's safety online is an important part of the Digital Agenda for Europe.