Year Percent of GDP 2004-01-01 33.2895333031264 2005-01-01 35.5613121297066 2006-01-01 35.3724209216233 2007-01-01 34.3316239811806 2008-01-01 34.3080246657357 2009-01-01 35.5519143711190 2010-01-01 37.8388477218107 2011-01-01 43.6334367367694 2012-01-01 45.2053477498835 2013-01-01 46.4760539646240 2014-01-01 39.7142685387104 2015-01-01 35.8463755538082 2016-01-01 33.4370810294257 2017-01-01 31.9414060579389 2018-01-01 32.2859925881372 2019-01-01 32.6422538797446