The 2009 CIA World Factbook

by United States. Central Intelligence Agency

Singapore
$51,600 (2008 est.)
$51,700 (2007 est.)
$48,600 (2006 est.)
note: data are in 2008 US dollars

Slovakia
$22,000 (2008 est.)
$20,700 (2007 est.)
$18,700 (2006 est.)
note: data are in 2008 US dollars

Slovenia
$29,600 (2008 est.)
$28,600 (2007 est.)
$26,800 (2006 est.)
note: data are in 2008 US dollars

Solomon Islands
$2,700 (2008 est.)
$2,500 (2007 est.)
$2,400 (2006 est.)
note: data are in 2008 US dollars

Somalia
$600 (2008 est.)
$600 (2007 est.)
$600 (2006 est.)
note: data are in 2008 US dollars

South Africa
$10,100 (2008 est.)
$9,900 (2007 est.)
$9,500 (2006 est.)
note: data are in 2008 US dollars

Spain
$34,600 (2008 est.)
$34,400 (2007 est.)
$33,200 (2006 est.)
note: data are in 2008 US dollars

Sri Lanka
$4,400 (2008 est.)
$4,200 (2007 est.)
$3,900 (2006 est.)
note: data are in 2008 US dollars

Sudan
$2,200 (2008 est.)
$2,100 (2007 est.)
$1,900 (2006 est.)
note: data are in 2008 US dollars

Suriname
$8,900 (2008 est.)
$8,500 (2007 est.)
$8,100 (2006 est.)
note: data are in 2008 US dollars