Year Percent of GDP 2004-01-01 11.0848 2005-01-01 9.9882 2006-01-01 9.0811 2007-01-01 12.9138 2008-01-01 17.8061 2009-01-01 19.2635 2010-01-01 17.5010 2011-01-01 23.7745 2012-01-01 23.1138 2013-01-01 23.6535 2015-01-01 22.1777