Year Percent of GDP 2002-01-01 22.4511 2003-01-01 25.3512 2004-01-01 24.5501 2005-01-01 28.0837 2006-01-01 27.4525 2007-01-01 28.8390 2008-01-01 28.2955 2009-01-01 22.1421 2010-01-01 23.9431 2011-01-01 27.0450 2012-01-01 26.3429 2013-01-01 24.7543 2014-01-01 23.7421 2015-01-01 16.6110 2016-01-01 16.5616 2017-01-01 18.6033 2018-01-01 19.4427 2019-01-01 19.6954