Year Percent of GDP 1998-01-01 29.2846886163740 1999-01-01 29.8187435336359 2000-01-01 27.7069417153797 2001-01-01 28.2958271639995 2002-01-01 27.7205202122781 2003-01-01 24.1937028925680 2004-01-01 21.3051543009862 2005-01-01 19.1115905329224 2006-01-01 16.0926853067815 2007-01-01 18.3062698875502 2008-01-01 19.1531358322557 2009-01-01 29.6853950499370 2010-01-01 34.5976735269332 2011-01-01 38.8535848346090 2012-01-01 42.3414436768697 2013-01-01 43.2903714138701 2014-01-01 45.8227886939275 2015-01-01 44.9559451820391