Outside access to, and information regarding the conditions of prisons in Cuba following its political revolution in the 1950s is limited. The government permitted limited access for some journalists in 2013, but it is unclear to what extent those facilities may have been representative of the country's prisons as a whole. Private interviews were not permitted, but officials highlighted the system's work and study programs, including the teaching of skilled trades such as carpentry. According to one 1988 report by the Institute for Policy Studies, prisoners were provided with education up to a ninth grade level, inmates were provided with training in technical skills and as much as 85% of the population worked. Political reeducation also played a major role in Cuban penology.