Job seekers look at help-wanted advertisements at a job fair in Seoul September 21, 2011. Over 40 years, South Korea has gone from having one of the highest birth rates in the Organisation for Economic Co-operation and Development (OECD) of advanced economies to the lowest, while life expectancy has surged. By 2018, 14 percent of its population will be over 65, making it officially an "aged society." That is six years sooner than Japan and more than a century before France, according to the Samsung Economic Research Institute (SERI). Picture taken September 21, 2011. To match Insight KOREA-DEMOGRAPHICS/ REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: SOCIETY BUSINESS EMPLOYMENT)