Year Percent of GDP 2004-01-01 26.9394 2005-01-01 26.5067 2006-01-01 28.8400 2007-01-01 32.3732 2008-01-01 32.7711 2009-01-01 36.5047 2010-01-01 38.2362 2011-01-01 42.1491 2012-01-01 45.0201 2013-01-01 49.3333 2014-01-01 53.7131 2015-01-01 55.8194 2016-01-01 59.8056