Year Percent of GDP 2004-01-01 48.9122 2005-01-01 49.6457 2006-01-01 53.1753 2007-01-01 55.8185 2008-01-01 54.7534 2009-01-01 57.9217 2010-01-01 60.0844 2011-01-01 61.1463 2012-01-01 62.9303 2013-01-01 66.2983 2014-01-01 68.1075 2015-01-01 71.2958 2016-01-01 71.3855