Year Percent of GDP 2004-01-01 61.4965 2005-01-01 64.8985 2006-01-01 67.6060 2007-01-01 71.4077 2008-01-01 76.3708 2009-01-01 74.8807 2010-01-01 75.1979 2011-01-01 77.6150 2012-01-01 81.5305 2013-01-01 82.5657 2014-01-01 86.1888 2015-01-01 91.4472 2016-01-01 92.2478