Year Percent of GDP 2004-01-01 18.9449578691109 2005-01-01 21.4718024778875 2006-01-01 26.0395482928903 2007-01-01 32.8493578896082 2008-01-01 32.0761569430448 2009-01-01 25.1251613883329 2010-01-01 27.2960272556807 2011-01-01 33.2403650007111 2012-01-01 28.5028741983810 2013-01-01 30.3243484813784 2014-01-01 30.1307039126995 2015-01-01 27.2024715531994 2016-01-01 24.6356321211580 2017-01-01 27.8893948541413 2018-01-01 30.4711742031627 2019-01-01 31.4104867480282