Year Percent of GDP 1995-01-01 17.5451006157781 1996-01-01 17.0650704766471 1997-01-01 17.7351222187871 1998-01-01 17.8619553005113 1999-01-01 19.4403698967502 2000-01-01 21.4127394843806 2001-01-01 19.6471422367498 2002-01-01 21.2299502813480 2003-01-01 21.9107418719004 2004-01-01 24.9782648158292 2005-01-01 25.7009444400055 2006-01-01 25.7452210206720 2007-01-01 25.6129623765782 2008-01-01 23.6414665615751 2009-01-01 20.1266821643990 2010-01-01 21.7199661582967 2011-01-01 22.1807851138308 2012-01-01 20.9383459536382 2013-01-01 19.3786008562747 2014-01-01 18.5530618770917 2015-01-01 17.7420706456672 2016-01-01 16.3619881006281 2017-01-01 15.0205037441604