Year Percent of GDP 1990-01-01 24.4806851423724 1991-01-01 17.7517913078306 1992-01-01 15.8312193134152 1993-01-01 13.6225081203374 1994-01-01 13.1619490409219 1995-01-01 11.4049990175170 1996-01-01 11.2418328744629 1997-01-01 11.3452176738095 1998-01-01 11.2801678443371 1999-01-01 13.4701885924417 2000-01-01 16.9838230125754 2001-01-01 19.9465031065577 2002-01-01 18.3935997670655 2003-01-01 20.7110411048023 2004-01-01 21.7859460652349 2005-01-01 21.2624786769833 2006-01-01 21.8766768090654 2007-01-01 21.6355735670806 2008-01-01 20.0539762261256 2009-01-01 23.0172811284363 2010-01-01 24.4197433757438 2011-01-01 24.1625607797052 2012-01-01 24.3112765154298 2013-01-01 24.8099135659199 2014-01-01 23.2970727082014 2015-01-01 22.9881410888278 2016-01-01 22.1150708200206