Greenland (both larger) are generally considered to be continental landmasses rather than islands. Three-quarters of Greenland is covered by the only permanent ice sheet outside Antarctica. With a population of about 56,480 (2013), it is the least densely populated territory in the world. About a third of the population live in Nuuk, the capital and largest city. The Arctic Umiaq Line ferry acts as a lifeline for western Greenland, connecting the various cities and settlements. Greenland has been inhabited off and on for at least the last 4,500 years by Arctic peoples whose forebears migrated there from what is now Canada.
Demographics of Afghanistan decade, which is due to the return of over 5 million expats. The only city in Afghanistan with over a million residents is its capital, Kabul. The other largest cities in the country are shown in the chart below. "0–14 years:" 42.3% (male 6,464,070/female 6,149,468) "15–64 years:" 55.3% (male 8,460,486/female 8,031,968) "65 years and over:" 2.4% (male 349,349/female 380,051) (2011 est.) In 1979, the population was reported to be about 15.5 million. 2.32% (2015) country comparison to the world: 39 "urbanization population:" 24% of the total population (2008) "rate of urbanization:" 5.4% annual rate of change (2005–10) "at birth:" 1.05