These data were derived from the mandatory report by the Administrative Office of the United States Courts to the Committee on the Judiciary of the U.S. House of Representatives. They indicate decisions taken by the Foreign Intelligence Surveillance Courts (FISC) in 2016 on applications for surveillance under the Foreign Intelligence Surveillance Act (FISA).
It is important to note that this does not provide insight into how 2016 compares to other years, or how the approval rate of FISA applications compare to normal wiretapping warrant applications under Title III. Nor does it tell us anything about the reasonableness of the individual applications. It is sufficiently interesting though, that I thought it was worth sharing.