Year Percent of GDP 2004-01-01 14.9622041909905 2005-01-01 15.3494319393796 2006-01-01 15.5060194000075 2007-01-01 19.1542184452407 2008-01-01 18.1994185112398 2009-01-01 17.1813449426474 2010-01-01 17.4681344148320 2011-01-01 16.4236548058147 2012-01-01 17.3597788746096 2013-01-01 17.5843542241650 2014-01-01 16.2674454365455 2015-01-01 16.7110492269872 2016-01-01 14.6679764647806 2017-01-01 17.5826049818050 2018-01-01 17.5860564501119 2019-01-01 17.1343530312752