Statistical Transparency Report Regarding the Use of National Security Authorities: Calendar Year 2018 [open pdf - 2MB]
From the Introduction: "Today, consistent with the Foreign Intelligence Surveillance Act of 1978 (FISA), as amended (codified in 50 U.S.C. § 1873(b)), and the Intelligence Community's (IC) Principles of Intelligence Transparency, we are releasing our sixth annual Statistical Transparency Report Regarding Use of National Security Authorities presenting statistics on how often the government uses certain national security authorities. Providing these statistics allows for an additional way to track the use of FISA authorities and National Security Letters (NSLs). The statistics also add further context regarding the IC's rigorous and multi-layered oversight framework that safeguards the privacy of United States person (U.S. person or USP) information and non-U.S. persons' information acquired pursuant to these national security authorities. This report goes beyond the government's statutory duty of providing statistics by further providing the public with detailed explanations as to how the IC uses its national security authorities. This document should be read in conjunction with the national security-related materials that the government has already released publicly, especially the documents that have been highlighted through the hyperlinks embedded in this report, as well as the statistical report provided by the Director of the Administrative Office of the U.S. Courts (50 U.S.C. § 1873(a), available on the AOUSC website)."
Office of the Director of National Intelligence: https://www.dni.gov/