The population of Turkey in 2003 was estimated by the United Nations at 71,325,000, which placed it as number 16 in population among the 193 nations of the world. In that year approximately 6% of the population was over 65 years of age, with another 30% of the population under 15 years of age. There were 102 males for every 100 females in the country in 2003. According to the UN, the annual population growth rate for 2000–2005 is 1.42%, with the projected population for the year 2015 at 82,150,000. The population density in 2002 was 87 per sq km (225 per sq mi).
It was estimated by the Population Reference Bureau that 75% of the population lived in urban areas in 2001, up from 44% in 1980. Istanbul (formerly Constantinople), the largest city, had a 2002 metropolitan population of 9,413,000. The largest metropolitan areas after Istanbul were Ankara, the capital city, with a 2002 metropolitan population of 3,131,000; Izmir (formerly Smyrna), 2,399,000; Adana, 1,289,000; Bursa, 1,299,000; and Gaziantep, 926,000. According to the United Nations, the urban population growth rate for 2000–2005 was2.6%.