Year Percent of GDP 1998-01-01 67.5909533465015 1999-01-01 62.3561144829211 2000-01-01 56.4907372339618 2001-01-01 53.5053409604785 2002-01-01 53.8875996682154 2003-01-01 54.8820886707721 2004-01-01 53.3484095617826 2005-01-01 53.2156383038360 2006-01-01 50.4365821671142 2007-01-01 47.9922779032597 2008-01-01 51.9831721482756 2009-01-01 59.4533272321048 2010-01-01 63.1377355970085 2011-01-01 65.5309746472863 2012-01-01 72.0160586738350 2013-01-01 72.8136077416146 2014-01-01 78.8888027573342 2015-01-01 78.1289197210593