For instance, studies of this kind have shown the prevalence of mental illness, criminality, delinquencies, prostitution, and drug addiction in urban centers and other highly developed places. 
Bílíọ̀nù naira (nípa Milionu méje dọ́là).Àwọn Ọjọ́ìbí ní 1962àwọn Gómìnà ìpínlẹ̀ ìmọ̀.. 