Here, for instance, is a chilling fact about the nineties: In any given week of the decade, there was a 10 percent chance the No.1 song was by Boyz II Men. Add Whitney Houston, Mariah Carey, and Bryan Adams, and chances hit 24 percent. Americans spent a quarter of a decade listening to this sort of thing: big, lavish ballads, built to charm middle-aged and middle-school listeners alike. Try to picture an environment or purpose for these songs, and the mind drifts to graduations, school-gym talent shows, Olympics montages.And today we have discopop. Plus ça change....
P. S. This article has showy graphs and charts but for me the only chart that can say anything is this
And note this is in dollars, not units, meaning the peak is lower -- and the recent trough is deeper.