Year Percent of GDP 2000-01-01 22.8606 2001-01-01 20.8714 2002-01-01 19.2508 2003-01-01 18.8771 2004-01-01 17.1286 2005-01-01 20.4629 2006-01-01 20.6196 2007-01-01 23.1527 2008-01-01 22.9714 2009-01-01 31.9611 2010-01-01 27.2313 2011-01-01 25.8028 2012-01-01 22.9841 2013-01-01 25.1094 2014-01-01 25.2140 2015-01-01 27.4871 2016-01-01 28.5147 2017-01-01 24.8890 2018-01-01 25.8677 2019-01-01 25.5809