The population of Uzbekistan in 2003 was estimated by the United Nations at 26,093,000, which placed it as number 39 in population among the 193 nations of the world. In that year approximately 4% of the population was over 65 years of age, with another 38% of the population under 15 years of age. There were 99 males for every 100 females in the country in 2003. According to the UN, the annual population growth rate for 2000–2005 is 1.51%, with the projected population for the year 2015 at 30,718,000. The population density in 2002 was 57 per sq km (147 per sq mi). The population is most dense in the Fergana Valley. It was estimated by the Population Reference Bureau that 37% of the population lived in urban areas in 2001. The capital city, Tashkent, had a population of 2,140,000 in that year. Samarkand had a population of about 370,000. According to the United Nations, the urban population growth rate for 2000–2005 was1.6%.