Kuyinto ejayelekileko neyaziwako bona , ngemva kokuridila komnotho kweminyaka eyadlulako yabo-1980 nekuthomeni kuka-1990 , iSewula Afrika yazifumana isebujameni besikhathi eside somnotho onzinzileko kusukela ngesikhathi kwathoma ukutlolwa khona kwembalobalo lezi ngomnyaka we-1940 .