ARL has released the 2011–2012 ARL Statistics dataset through ARL Statistics Analytics, a subscription-based service for nonmember libraries, vendors, commercial parties, and others interested in accessing the final, verified ARL Statistics data through an interactive interface. (ARL member institutions enjoy free access to the analytics as a benefit of membership.) ARL Statistics is a series of annual data-collection activities that describe the collections, expenditures, staffing, and service activities for the member libraries of the Association of Research Libraries.
Read what you can do with the numbers here.