Year Percent of GDP 1995-01-01 4.25 1996-01-01 4.20 1997-01-01 4.07 1998-01-01 2.93 1999-01-01 1.93 2000-01-01 2.59 2001-01-01 2.51 2002-01-01 2.62 2003-01-01 2.11 2004-01-01 2.51 2005-01-01 3.15 2006-01-01 3.13 2007-01-01 2.97 2008-01-01 3.77 2009-01-01 3.23 2010-01-01 3.55 2011-01-01 4.01 2012-01-01 4.78 2013-01-01 5.45