Year Percent of GDP 2000-01-01 27.0144 2001-01-01 24.3742 2002-01-01 26.4486 2003-01-01 30.4976 2004-01-01 32.3464 2005-01-01 35.1741 2006-01-01 28.9910 2007-01-01 27.7109 2008-01-01 41.3674 2009-01-01 38.0974 2010-01-01 35.9394 2011-01-01 33.8368 2012-01-01 34.3238 2013-01-01 31.7019 2014-01-01 30.9417 2015-01-01 37.2186 2016-01-01 33.5960 2017-01-01 33.5575 2018-01-01 30.1590 2019-01-01 30.0979