Year Percent of GDP 2004-01-01 4.2493 2005-01-01 4.3514 2006-01-01 4.9853 2007-01-01 8.2940 2008-01-01 7.1324 2009-01-01 7.7324 2010-01-01 7.4025 2011-01-01 7.8542 2012-01-01 7.7802 2013-01-01 8.2711 2014-01-01 8.3507 2015-01-01 9.3092 2016-01-01 10.1463