Year Percent of GDP 2004-01-01 7.7745 2005-01-01 8.4815 2006-01-01 9.8614 2007-01-01 10.8762 2008-01-01 10.2171 2009-01-01 13.2069 2010-01-01 13.9563 2011-01-01 16.5646 2012-01-01 14.7666 2013-01-01 15.7660 2014-01-01 17.2644 2015-01-01 22.1594 2016-01-01 20.2226