Year Percent of GDP 2004-01-01 37.0146895822317 2005-01-01 30.9646884243920 2006-01-01 36.6990493490332 2007-01-01 31.7003369296417 2008-01-01 29.6304630938984 2009-01-01 30.2774171234547 2010-01-01 29.8775153104300 2011-01-01 33.6444026938866 2012-01-01 31.7549293436858 2013-01-01 34.0385472251671 2014-01-01 34.0428906515789 2015-01-01 42.7914937825630 2016-01-01 41.7568444154759 2017-01-01 42.1633662621595 2018-01-01 44.3977310841466 2019-01-01 42.1129767338537