Write a question about the following article: The war changed the ethnic and religious profile of the city. It had long been a multicultural city, and often went by the nickname of "Europes Jerusalem". At the time of the 1991 census, 49.2 per cent of the citys population of 527,049 were Bosniaks, 29.8 percent Bosnian Serbs, 10.7 percent Yugoslavs, 6.6 percent Bosnian Croats and 3.6 percent other ethnicities (Jews, Romas, etc.). By 2002, 79.6 per cent of the cantons population of 401,118 were Bosniak, 11.2 percent Serb, 6.7 percent Croat and 2.5 percent others (Jews, Romas, Arabs, etc.).

Question about the article:
In 1991, how many people, in terms of percentage, were either Bosniaks, Bosnian Serbs, or Yugoslavs?