Year Percent of GDP 2005-01-01 9.3041 2006-01-01 7.5892 2007-01-01 6.9738 2008-01-01 6.4890 2009-01-01 5.1979 2010-01-01 4.1950 2011-01-01 3.3125 2012-01-01 3.1712 2013-01-01 2.7320 2014-01-01 2.6074 2015-01-01 2.8225 2016-01-01 2.9402