Year Percent of GDP 2004-01-01 3.7570 2005-01-01 3.5618 2006-01-01 3.6049 2007-01-01 4.3313 2008-01-01 5.8878 2009-01-01 7.1400 2010-01-01 8.4032 2011-01-01 8.3789 2012-01-01 6.9692