Islamic terrorism has been carried out in Europe by the jihadist groups Islamic State (ISIL) or Al-Qaeda as well as Islamist lone wolves since the late 20th century. Europol, which releases the annual EU Terrorism Situation and Trend report (TE-SAT), used the term "Islamist terrorism" in reports for the years 2006–2010, "religiously inspired terrorism" for the years 2011–2014, and has used "jihadist terrorism" since then. Europol defines jihadism as "a violent ideology exploiting traditional Islamic concepts".