ISIL foreign fighters who have gone to Syria tend to have high levels of education but low incomes. One of the reasons fighters join is a feeling of exclusion in their home countries, according to the 2016 Global Terrorism Index(GTI), produced by the Institute for Economics and Peace. The report adds that half of all plots with an ISIL connection were conducted by people who have had no direct contact with ISIL.

Since 2006, 98 percent of all deaths from terrorism in the U.S. have resulted from attacks carried out by lone actors, according to the GTI. The report notes that 76 countries improved their scores in the GTI, while 53 countries deteriorated. As many countries experienced record levels of terrorism, the overall GTI score deteriorated by 6 percent from the previous year.

Iraq, Afghanistan, Nigeria, Pakistan and Syria accounted for 72 percent of all terrorism deaths last year. Two of these countries, Iraq and Nigeria, had the biggest decreases in terrorism-related deaths, a 32 percent reduction since 2014, the report states.

According to the report, “93 percent of all terrorist attacks between 1989 and 2014 occurred in countries with high levels of state sponsored terror – extra-judicial deaths, torture and imprisonment without trial.” More than 90 percent of all attacks occurred in countries engaged in violent conflicts, while just 0.5 percent happened in countries that did not suffer from conflict or political terror.

Read the full report here.