The Association of Research Libraries has produced separate machine-readable datafiles for its nonuniversity members' ARL Statistics data since 1999-2000. This includes data on collections, staffing, expenditures, services, and library characteristics (with regards to the "University characteristics" questions asked on the ARL Statistics, nonuniversities always respond -2 or N/A to indicate that the questions are not applicable).
The available files are listed below. If you have any trouble downloading, contact <stats@arl.org> and the files can be e-mailed to you.