Year Percent of GDP 2004-01-01 21.0789292194297 2005-01-01 35.7447216387159 2006-01-01 30.4453847507205 2007-01-01 29.0154793919914 2008-01-01 26.9037693310513 2009-01-01 27.2751629249044 2010-01-01 36.6216221599852 2011-01-01 35.4074345781374 2012-01-01 38.1063558509080 2013-01-01 38.4574109532169 2014-01-01 37.6927027120788 2015-01-01 33.7879876352099 2016-01-01 30.2209378274825 2017-01-01 28.6458342080072 2018-01-01 27.9582013117269 2019-01-01 30.5033438005007