Year Percent of GDP 1995-01-01 14.89 1996-01-01 16.26 1997-01-01 20.25 1998-01-01 21.03 1999-01-01 24.37 2000-01-01 32.05 2001-01-01 30.29 2002-01-01 34.35 2003-01-01 33.63 2004-01-01 37.52 2005-01-01 43.44 2006-01-01 49.12 2007-01-01 53.48 2008-01-01 52.30 2009-01-01 47.59 2010-01-01 49.24 2011-01-01 49.09 2012-01-01 52.91 2013-01-01 51.36