“In the past, although not required to do so under the FOIA, the Office of Information and Privacy (OIP) compiled summaries of the information contained in agency annual FOIA reports and made them publicly available. OIP is now resuming that practice starting with the annual FOIA reports for Fiscal Year 2006. Set forth below is a summary compilation of the information contained in the annual FOIA reports prepared by the fifteen federal departments and seventy-seven other federal agencies for Fiscal Year 2006.”