So 80 s were albums and 90 s were singles ok ill take your word for it That is the exact same trend Jacksons sales took His album sales slipt and his singles sales became increasingly significant It wasn t Jacksons fault albums went down it was the Market That is what your saying His sales with albums and singles followed the trends exactly for the 80 s and 90 s Infact he was at the hight of these trends with HIstory He stuck at the top of the market until 1997