I love this numbers stuff.
I was surprised by Thriller, but DSOM and Rumours are sort of expected.
Looking at the top ten in sales:
Taylor Swift and Lana Del ray accounted for 574,000 units, other newer acts 296,000, and 'catalog' sales were 279,000.
Taylor and Lana sold about as many records as the rest of the top ten combined. Impressive. I hope they make some money, it seems hard to do these days.
21.7 million LPs, nice.
Trivia: In 1921, there were 140 million 'records' sold.
1977 and 1978 were the modern LP peak, at about 300 million LPs per year.