Year Percent of GDP 2004-01-01 17.0539321906280 2005-01-01 18.5773292465882 2006-01-01 17.8727923091706 2007-01-01 18.1027923416703 2008-01-01 18.5023427398476 2009-01-01 20.1702377211994 2010-01-01 20.2472870976093 2011-01-01 19.1460835042498 2012-01-01 19.7833950658799 2013-01-01 19.3797949784439 2014-01-01 17.9142271496968 2015-01-01 17.8086889555980 2016-01-01 17.6633602470757 2017-01-01 17.2961285802687 2018-01-01 18.7888499757137 2019-01-01 20.0984347411031