GENEVA The U.S. has tumbled further down a global ranking of the world's most competitive economies, landing at fifth place because of its huge deficits and declining public faith in government, a global economic group said Wednesday. The announcement by the World Economic Forum was the latest bad news for the Obama administration, which has been struggling to boost the sinking U.S. economy and lower an unemployment rate of more than 9 percent. Switzerland held onto the top spot for the third consecutive year in the annual ranking by the Geneva-based forum, which is best known for its exclusive meeting of luminaries in Davos, Switzerland, each January. Singapore moved up to second place, bumping Sweden down to third. Finland moved up to fourth place, from seventh last year. The U.S. was in fourth place last year, after falling from No. 1 in 2008. The rankings, which the forum has issued for more than three decades, are based on economic data and a survey of 15,000 business executives. More : US falls to 5th survey shows in global competitiveness!