The index is a survey put forth by the UN to determine the happiest people among 150 countries.
Nke a bụ ihe na-egosi ntụle obi (Obi ụtọ Planet Index) ma ejiri ya mee ihe n'ọmụmụ ihe chọrọ mba kachasị nwee obi ụtọ n'ụwa niile n'etiti mba 151.