The Department of Homeland Security has released the 2013 Freedom of Information Act Report detailing the agencies attempts to comply with the federal open government law. The FOIA requires each agency to provide the numbers of requests received and processed, the time taken to respond, the outcome of each request, and other statistics. In 2013, the DHS reported a significant increase in its FOIA backlog, which rose from 28,553 unanswered requests in 2012 to 53,598 unanswered requests in 2013. Of the nine exemptions that an agency can invoke to withhold documents, DHS relied most heavily on exemption 7(C) (law enforcement records that if released would constitute an invasion of personal privacy) and 7(E) (law enforcement records that if released would disclose law enforcement techniques or procedures, which is significant because the DHS is not a law enforcement agency. DHS reported granting about 7% of requests for expedited processing. EPIC has prevailed in several FOIA lawsuits against DHS, and has also worked to reform the agency's FOIA processing practices for other requesters. For more information, see EPIC v. DHS - Body Scanner FOIA Appeal, EPIC v. DHS - Social Media Monitoring, and EPIC v. DHS - SOP 303.