Year Percent of GDP 2004-01-01 29.3937 2005-01-01 27.6577 2006-01-01 26.5450 2007-01-01 26.9563 2008-01-01 24.3398 2009-01-01 27.0899 2010-01-01 29.2722 2011-01-01 27.9125 2012-01-01 28.8990 2013-01-01 31.7085 2014-01-01 32.2017 2015-01-01 34.2564 2016-01-01 34.7718 2017-01-01 39.3567