Year Percent of GDP 2004-01-01 216.1072 2005-01-01 223.2159 2006-01-01 235.4568 2007-01-01 234.7659 2008-01-01 229.8793 2009-01-01 225.3660 2010-01-01 233.4091 2011-01-01 235.6634 2012-01-01 233.5639 2013-01-01 242.8848 2014-01-01 249.5537 2015-01-01 254.2805 2016-01-01 270.3891 2017-01-01 280.8521