U.S. Bureau of Justice Statistics, Prisoners, annual reports on state and federal prisoners, 1975-2012. With reports on prisoner movements (admissions and releases) annually from 1977 and prisoner counts since 1925.
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Annual statistics on state and federal prisoners in the U.S. are available from 1925 in national reports. This archive provides the main annual publication of National Prisoner Statistics from 1975 to 2012 as a single, downloadable archive. Additional, machine-readable data on movements (admissions and releases) of state and federal prisoners from 1977 to 1998 are included.