Denmark , Norway , Switzerland , the Netherlands and Sweden are the world 's happiest countries . Comment: The United States ranked 17th , while the UK was 22nd of the 156 nations surveyed . `` If we want a happier world , we need a completely new deal on mental health . '' Egypt had the greatest fall of happiness levels in the past five years , the report said .
Denmark , Norway , Switzerland , the Netherlands and Sweden are the world 's happiest countries . Comment: The United States ranked 17th , while the UK was 22nd of the 156 nations surveyed . Egypt had the greatest fall of happiness levels in the past five years , the report said .