It is a fascinating report. You can download teh full 52 page breakdown of the stats from the unicef website.
Something quite interesting is that for Switzerland, they had the highest score (80% of children) for the friendliness/helpfulness of 11, 13 and 15 year olds to each other, but then one of the highest rates of bullying in the same age group. 40% of children for the same age groups said they had been bullied in the last 2 months.
I guess that means the 20% who are unfriendly and unhelpful are going round bullying half of all the other children! Scary