If you love statistics, data, and libraries, check this out. Bibliostat Connect provides New York data back to 1991 from the Annual Report for Public and Association Libraries and the latest data from the Federal State Cooperative System (FSCS) and the Public Library Data Service (PLDS) for all public libraries in the nation. It's fairly easy to use. The user ID is new york, and the password is pals. Scroll down til you get to the yellow box on the left.
Have fun!
http://www.nysl.nysed.gov/libdev/libs/index.html#Statistics