Year Percent of GDP 2004-01-01 2.4729 2005-01-01 2.3169 2006-01-01 2.8923 2007-01-01 2.3316 2008-01-01 1.7487 2009-01-01 1.8771 2010-01-01 3.1103 2011-01-01 4.1828 2012-01-01 5.1357 2013-01-01 5.7016