The population of Pakistan in 2003 was estimated by the United Nations at 153,578,000, which placed it as number 6 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 42% of the population under 15 years of age. There were 105 males for every 100 females in the country in 2003. According to the UN, the annual population growth rate for 2000–2005 is 2.44%, with the projected population for the year 2015 at 204,465,000. The population density in 2002 was 180 per sq km (467 per sq mi).
It was estimated by the Population Reference Bureau that 37% of the population lived in urban areas in 2001. Kara¯chi is the largest city with over twelve million people in that year. The capital city, Islamabad, had a population of 1,018,000. Other large cities include Lahore, Faisalabad, and Rawalpindi, Gujranwala, Mutlan, Hyderabad, and Peshawar, each with well over one million people. According to the United Nations, the urban population growth rate for 2000–2005 was 4.1%.