Year Percent of GDP 2004-01-01 5.2395 2005-01-01 8.9202 2006-01-01 15.2169 2007-01-01 20.3410 2008-01-01 14.9773 2009-01-01 13.7114 2010-01-01 10.2550 2011-01-01 8.7705 2012-01-01 9.7081 2013-01-01 10.5026 2014-01-01 10.5210 2015-01-01 10.7112 2016-01-01 9.2705 2017-01-01 10.3176