>>>0.4% or 163 books sold 100,000 copies or more >>>0.7% or 320 books sold between 50,000-99,999 copies >>>2.2% or 1,015 books sold between 20,000-49,999 copies >>>3.4% or 1,572 books sold between 10,000-19,999 copies >>>5.5% or 2,518 books sold between 5,000-9,999 copies >>>21.6% or 9,863 books sold between 1,000-4,999 copies >>>51.4% or 23,419 sold between 12-999 copies >>>14.7% or 6,701 books sold under 12 copies…
Limiting it to the top publishers immediately leaves out lots of books. But OK, these are major players who are putting their own resources on the line for some books, so that's a valid slice.
For that 14.7% that sold under 12 copies: as a self-published author, I have to say, "Why not my book instead of that crap?"
The problem, of course, is that they didn't expect it to sell that few copies when they printed it. They didn't say, "Hey, this one looks like 10 copies or so. Let's go with it!"