The Association of Research Libraries has released ARL Statistics 2008–2009.
Here's an excerpt from the announcement:
The Association of Research Libraries (ARL) has published the ARL Statistics 2008–2009, the latest in a series of annual publications that describe the collections, staffing, expenditures, and service activities of ARL's member libraries. Of the 124 members in 2008–2009, 114 were university libraries (17 in Canada and 107 in the US); the remaining 10 were public, governmental, and nonprofit research libraries (two in Canada, eight in the US).
ARL libraries are a relatively small subset of libraries in North America, but they account for a large portion of academic library resources in terms of assets, budgets, and the number of users they serve. The total library expenditures of all 124 member libraries in 2008–2009 was slightly more than $4 billion; of that total, roughly $3.1 billion was spent by the 114 university libraries and slightly more than $940 million the 10 nonuniversity libraries.