At some point during 1991–92, something substantial changed in the way Israel's security agencies interrogated Palestinian detainees. The change was not in the number of detainees interrogated; on any given day in 1993, some four hundred to six hundred Palestinians continued to be interrogated by either the General Security Services (GSS) or the military (Israel Defense Forces; IDF). Overall, Israel interrogated some five thousand Palestinians every year from 1988 to 1994. Nor was the change one of interrogation results: the conviction rate of Palestinians in the military courts remained above 96 percent, with most convictions based on confessions obtained during interrogation. According to official statistics, of the 83,321 Palestinians tried in military courts in the West Bank and Gaza Strip between 1988 and 1993, only 2,731, or 3.2 percent, were acquitted. The security forces were still questioning a remarkable proportion of the adult male population, obtaining vast amounts of information on Palestinian social, political, and military activities.