Year Percent of GDP 1995-01-01 16.0724270315293 1996-01-01 15.7051299786555 1997-01-01 16.9750744945636 1998-01-01 17.0601910878666 1999-01-01 17.5130501304697 2000-01-01 20.8446528296084 2001-01-01 20.3405244425296 2002-01-01 19.4358615869402 2003-01-01 18.8574379161257 2004-01-01 19.6438173561577 2005-01-01 20.7531240968778 2006-01-01 22.7958156626676 2007-01-01 23.3052481831778 2008-01-01 23.3355188463533 2009-01-01 18.8909200485738 2010-01-01 22.8411072131954 2011-01-01 24.5116858685682 2012-01-01 23.6272980163044 2013-01-01 22.5882818542983 2014-01-01 22.0085273437388 2015-01-01 22.3572612377562 2016-01-01 21.8958759068285 2017-01-01 23.3789629779818