Statistical Transparency Report Regarding the Use of National Security Authorities: Calendar Year 2019 [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 seventh annual 'Statistical Transparency Report Regarding Use of National Security Authorities' presenting statistics on how often the government uses certain national security authorities. These statistics add further context regarding the IC's rigorous and multi-layered oversight framework that safeguards the civil liberties and 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."
Office of the Director of National Intelligence: https://www.dni.gov/