Year Percent of GDP 2004-01-01 8.0398 2005-01-01 9.7029 2006-01-01 9.8511 2007-01-01 10.5822 2008-01-01 14.3024 2009-01-01 11.5828 2010-01-01 10.3870 2011-01-01 11.2871 2012-01-01 13.3888 2013-01-01 13.4770 2014-01-01 14.6624 2015-01-01 16.8787 2016-01-01 17.2059 2017-01-01 19.5328