99% of college students are book buyers who buy books. There are
surveys and research, but your criteria is unlikely. I gather you
don't want the percentage of total book sales, you want to exclude
persons who are presently (or expect to resume college in 4 months or
less) in college even part time, but you want to include persons who
graduated 1 to 1000 days ago even if they are age 39 and you don't
care if they bought one book or 100 books in the approriate time
period. You want to include foreign visitors who bought one or more
books while in the USA, and include visitors in the number of book
buyers of all ages even if they did not buy a book in the USA. You
likely don't want to include used book sales, comic books, note books,
diaries, ledger books, nor books that look like magazines. A problem
is people often buy books for some one else and people sometimes give
survays poorly thought out answers or lie deliberately. Persons who
receive adult training are not in college unless the institution fits
the usual description of a college. I can do a guesstimate. There have
been 400,000,000 book buyers in the USA in the year 2000 and 2001.
20,000,000 of them bought one or more books in the USA in that time
period and fit your criteria = 5% Do you want to adjust your
criteria? I included books for very small children, if they look look
books. I did not include digital book sales. Neil |