The population of Bulgaria is 7,364,570 people according to the 2011 national census. The majority of the population, 72.5%, reside in urban areas. , Sofia is the most populated urban centre with 1,241,675 people, followed by Plovdiv (346,893), Varna (336,505), Burgas (202,434) and Ruse (142,902). Bulgarians are the main ethnic group and constitute 84.8% of the population. Turkish and Roma minorities account for 8.8 and 4.9%, respectively; some 40 smaller minorities account for 0.7%, and 0.8% do not self-identify with an ethnic group. Former Statistics head Reneta Indzhova has disputed the 2011 census figures, suggesting the actual population is smaller than reported. The Roma minority is usually underestimated in census data and may represent up to 11% of the population. Population density is 65 per square kilometre, almost half the European Union average.