The following are documents gathered by Perry from the first 2 years of the Tatlock project in the HDW.
Since it's too large for email, I'm (clandestinely) putting Professor Tatlock's MSS chapters here for download (please don't share): folder.
Documents on library holdings of books in our set. Original spreadsheets are in the folder library-holdings-originals; summary numbers are in the the sheets in the top-level lib-holdings folder.
The file DefinitiveControlBookList contains library holdings information for the "control" list of non-Tatlock books from the 1876 Publisher's Weekly list of popular (or likely best-selling) titles.
Here's a list of library catalogues consulted.
John Tebbel is an authority on publishing history in the US. His A History of Book Publishing in the United States contains information on total US publication, at pages 675-708 of vol. 2 (New York: R. R. Bowker, 1975), summarized in the following spreadsheet: Tebbel yearly numbers.
Material that's effectively a summary of work up to late 2010, given as a presentation with links to charts & some miscellaneous other stuff.