Year Percent of GDP 2004-01-01 10.8294 2005-01-01 12.6806 2006-01-01 13.7382 2007-01-01 13.3776 2008-01-01 14.2264 2009-01-01 14.2852 2010-01-01 13.8041 2011-01-01 12.3366 2012-01-01 12.0266 2013-01-01 13.5814 2014-01-01 16.4417 2015-01-01 17.4860 2016-01-01 18.7626 2017-01-01 19.8216