"Figure 4: Total difficulties score category by happiness with school, 2011 to 2012","" "United Kingdom","" "","" "Notes","1. Children aged 10 to 15 years" "Unit","%" "","" "","Close to average or normal","Slightly raised","High or very high" "Relatively happy","81.9","9.1","9.1" "Relatively unhappy","43.6","18.6","37.7"