Year Percent of GDP 2004-01-01 28.0139 2005-01-01 31.0460 2006-01-01 30.9495 2007-01-01 30.2537 2008-01-01 29.2452 2009-01-01 33.2225 2010-01-01 34.2162 2011-01-01 33.6665