Year Percent of GDP 2000-01-01 46.3437 2001-01-01 40.3071 2002-01-01 37.2199 2003-01-01 32.1757 2004-01-01 27.8201 2005-01-01 23.1478 2006-01-01 23.8795 2007-01-01 23.8517 2008-01-01 20.9632 2009-01-01 23.9119 2010-01-01 25.1642 2011-01-01 24.5911 2012-01-01 29.1170 2013-01-01 30.2440 2014-01-01 30.9710 2015-01-01 33.3837 2016-01-01 33.5874 2017-01-01 35.0270 2018-01-01 34.1954 2019-01-01 33.0830