Year Percent of GDP 2000-01-01 18.2639 2001-01-01 17.5255 2002-01-01 20.3137 2003-01-01 22.1581 2004-01-01 23.4818 2005-01-01 22.8577 2006-01-01 22.5338 2007-01-01 22.8206 2008-01-01 23.4995 2009-01-01 23.6055 2010-01-01 21.6988 2011-01-01 22.7908 2012-01-01 21.8677 2013-01-01 20.4696 2014-01-01 22.7404 2015-01-01 19.3573 2016-01-01 20.0004 2017-01-01 22.0952 2018-01-01 23.0176 2019-01-01 23.1972