Less than a quarter (22%) of Ukrainians have not heard anything about the investigation into corruption in the energy sector involving high-ranking state officials, 77% know about it, but only 35% have heard a lot about it and understand its essence, and 42% have heard something, but do not have a holistic idea, according to the results of a sociological survey on public perception of the anti-corruption investigation within the framework of the "Mindich tapes," conducted from November 26 to December 13 by the Kyiv International Institute of Sociology (KIIS).