Year Percent of GDP 2004-01-01 58.5432 2005-01-01 54.2570 2006-01-01 59.4205 2007-01-01 64.4871 2008-01-01 74.8514 2009-01-01 71.3007 2010-01-01 67.2181 2011-01-01 72.0837 2012-01-01 75.9792 2013-01-01 78.0355 2014-01-01 79.7831 2015-01-01 83.1230 2016-01-01 83.0228