Year Percent of GDP 1990-01-01 18.44775385014830 1991-01-01 13.36556733627570 1992-01-01 10.87899515874650 1993-01-01 8.18621092657163 1994-01-01 5.69321973711674 1995-01-01 4.61010017761248 1996-01-01 3.67349666548456 1997-01-01 4.64153124886552 1998-01-01 10.66984376884350 1999-01-01 20.00579979919920 2000-01-01 21.96457351666910 2001-01-01 24.57827885544900 2002-01-01 30.07035627215720 2003-01-01 27.04602265334160 2004-01-01 24.39643839016340 2005-01-01 25.45813496490670 2006-01-01 24.38062722490090 2007-01-01 22.99345163181460 2008-01-01 22.45021032392110 2009-01-01 26.77922570179540 2010-01-01 26.90083061008310 2011-01-01 28.13200615713740 2012-01-01 28.44472523127550 2013-01-01 34.78183339860550 2014-01-01 39.56865221736070 2015-01-01 35.26486929118460