1942-1948 were not included as Congressional documents but most of those are available from HathiTrust. UTSA is a member of HathiTrust, so if you logon you can access and download the full document. (If you don’t log on you can only access documents one page at a time.)
The years from 1870-1941, & 1949 for the Annual Report of the Attorney General of the United States are available in the database ProQuest Congressional each as a full text downloadable PDF file. Here’s how you would access those:
Title search for "attorney general of the united states annual report" and check the box for House and Senate Documents.
Some years also available free through HathiTrust.