USCIS advertises that is has an online Electronic Reading Room. It’s really a Web-based searchable document database of public requested Freedom of Information Act (FOIA) documents; mixed with USCIS documents that the government decided may have a larger public demand. You can use pull-downs to choose different listed subjects and include any month/year date from January 2011 to the present. You can also type in your own keywords to search.
For more detailed information about this subject please review the USCIS, “Electronic Reading Room“ and try it for yourself.
Source of Information:
USCIS.gov, Web-Based Document Database: