"Seventy-one individuals have been charged with ISIS [Daesh]-related activities since March 2014," the report states. "Fifty-six have been arrested in 2015 alone, a record number of terrorism-related arrests for any year since 9/11."
The report "ISIS in America" also found that as of the fall of 2015, US authorities have spoken to at least 250 Americans who have travelled or attempted to travel to Syria or Iraq to join Daesh.
Moreover, the report states there are at least 900 active investigations against Daesh sympathizers in all 50 US states.
The average age of individuals facing Daesh-related charges is 26, and more than 86 percent of those individuals are male, according to the report.
The Program on Extremism reviewed more than 7,000 pages of legal documents detailing Daesh-related legal proceedings, including criminal complaints, indictments, affidavits and courtroom transcripts, prior to publishing the report.