The Administrative Office of the U.S. Courts (AO), established in 1939, provides administrative support for the federal judiciary.
The AO produces a number of statistical reports about caseloads and other activities of the federal judiciary. Some titles include:
Annual report of the Director of the Administrative Office of the United States Courts (JU 10.1:) Includes data about budget, personnel, physical facilities, and other aspecs of the federal judiciary.
Federal judicial caseload statistics (JU 10.21:)
Wiretap report (JU 10.19:)