Washington, DC—In 2012, Americans made 1.5 billion trips to public libraries in the United States—the equivalent of more than 4.1 million visits each day, according to new research by the Institute of Museum and Library Services (IMLS). The research indicates there is still a high demand for the resources and services of the nation’s approximately 9,000 public libraries.

via Press Releases IMLS 2012 Public Libraries Survey Report Issued.

See this page for the download link, 14MB file…
http://www.imls.gov/research/public_libraries_in_the_us_fy_2012_report.aspx