Year Percent of GDP 1995-01-01 2.85 1996-01-01 2.96 1997-01-01 3.09 1998-01-01 3.21 1999-01-01 3.23 2000-01-01 3.26 2001-01-01 3.28 2002-01-01 3.02 2003-01-01 2.90 2004-01-01 2.52 2005-01-01 2.39 2006-01-01 2.21 2007-01-01 2.13 2008-01-01 2.31 2009-01-01 2.32 2010-01-01 2.59 2011-01-01 3.30 2012-01-01 3.61 2013-01-01 3.98