Year Percent of GDP 2004-01-01 18.6216631369026 2005-01-01 22.2401659566167 2006-01-01 22.1665340901192 2007-01-01 23.2479949646878 2008-01-01 22.7645135258965 2009-01-01 23.2729461598957 2010-01-01 25.1224089011738 2011-01-01 24.6790846799027 2012-01-01 23.8419343694725 2013-01-01 22.7005437127895 2014-01-01 23.3498761166487 2015-01-01 24.3389654176517 2016-01-01 22.3358082441988 2017-01-01 21.2942507439711 2018-01-01 21.1428934590894 2019-01-01 21.4883417018951