Denmark , Norway , Switzerland , the Netherlands and Sweden are the world 's happiest countries . Rwanda , Burundi , the Central African Republic , Nigeria and Togo are the least satisfied with their lives . The United States ranked 17th , while the UK was last of the 156 nations surveyed . Egypt had the greatest fall of happiness rates in the past five years , the report said .
Denmark , Norway , Switzerland , the Netherlands and Sweden are the world 's happiest countries . Rwanda , Burundi , the Central African Republic , Benin and Togo are the least satisfied with their lives . 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 .