The ones that I found most interesting were these tracked by Nielsen BookScan:
Minimum number of different books sold in the U.S. in 2006: 1,446,000Or, to put it another way:
Number of those that sold fewer than 99 copies: 1,123,000
Number that sold more than 100,000: 483
Out of the 1,446,000 books released in 2006, 78% sold less than 99 copies while 22% sold more than 99 copies. Of that 22%, less than 1% sold more than 100,000 copies.Sobering statistics. I'd like to know how many of that 78% were self-published books.
See Bluenana's post here.