Year Percent of GDP 2004-01-01 35.6741068022855 2005-01-01 35.3991107073943 2006-01-01 34.6484119148246 2007-01-01 49.7897119272958 2008-01-01 48.5351919265418 2009-01-01 43.7894260781772 2010-01-01 47.6473214365370 2011-01-01 47.5087270538801 2012-01-01 37.1935232188728 2013-01-01 31.6295846399243 2014-01-01 37.0042257739279 2015-01-01 38.7758039464074 2016-01-01 37.4508301844217 2017-01-01 38.6476546150098 2018-01-01 36.3015166503450 2019-01-01 38.5923480505144