A Profile of the World, 2012 Source: The World Factbook, 2012 Geography Age:4.55 billion years old. Total area:510.072 million sq km (196.940 million sq mi).Land area:148.94 million sq km (57.506 million sq mi).Water area:361.132 million sq km (139.434 million sq mi).Coastline: Land boundaries:251,060 km (156,262.58 mi.), not counting shared boundaries twice. Climate:Two large areas of polar climates are separated by two rather narrow temperate zones from a wide equatorial band of tropical to subtropical climates. Terrain:Highest elevation is Mt. Everest at 8,850 m (29,035 ft) and lowest land depression is the Dead Sea at –411 m (–1,349 ft) below sea level. The greatest ocean depth is the Mariana Trench at –10,924 m Land use:Arable land:10.57%.Permanent crops:1.04%.Other:88.39% (2005 est.).Irrigated land:3,245,556 sq km. See also Atlas of the World. People Population:7,021,836,029 (July 2012 est.). Growth rate:1.096% (2012 est.). Birth rate:19.14 births/1,000 population (2012 est.). Death rate:7.99 deaths/1,000 population (2012 est.). Sex ratio (at birth):1.07 males/females (2011 est.). Infant mortality rate:39.48 deaths/1,000 live births (2012 est.). Life expectancy at birth:Total population:67.59 years.Male:65.59 years.Female:69.73 years (2012 est.). Total fertility rate:2.47 children born per woman (2012 est.). Literacy:Age 15 and over who can read and write (2005 est.).Total population:83.7%.Male:88.3%.Female:79.2%NOTE:More than two-thirds of the world's 793 million illiterate adults are found in only eight Government and Economy Political divisions:195 sovereign nations, 72 dependent areas, and 6 disputed territories. Economy:In 2011, world output — and per capita income — began to recover from the 2008–09 recession, the first global downturn since 1946. Gross World Product (GWP) grew 3.7%, a slowdown GWP/PPP:$79.39 trillion (2011 est.). GWP—real growth rate:3.7% (2011 est.). GWP/PPP—per capita:$11,900 (2011 est.). GWP composition:agriculture 6%, industry 30.7%, services 63.4% (2011 est.). Inflation rate (consumer price index):developed countries: 3.1%; developing countries: 6.3% (2011 est.). Note: Developed countries 0% to 4% typically; developing countries 5% to 10% typically; Unemployment rate:9.1% (2011 est.). Exports:$18.15 trillion (2011 est.). Imports:$17.94 trillion (2011 est.). External debt:$69.05 trillion (2011 est.)