THE WEEK'S MOST POPULAR SONGS RANKED BY RHYTHMIC RADIO AIRPLAY DETECTIONS, AS MESURED BY MEDIABASE AND PROVIDED BY LUMINATE. STATIONS ARE ELECTRONICALLY MONITORED 24 HOURS A DAY, 7 DAYS A WEEK.

A hard-won recovery in sub-Saharan Africa has been overtaken by recent events. The sudden shift in the global outlook has clouded the region’s short-term prospects and significantly complicated policy ...