Year Percent of GDP 2004-01-01 95.0471457037780 2005-01-01 86.4670269491813 2006-01-01 37.3666371823128 2007-01-01 32.7501006767018 2008-01-01 31.4897210816048 2009-01-01 33.6775949968432 2010-01-01 31.6904082067942 2011-01-01 32.1811903727957 2012-01-01 33.0284760893165 2013-01-01 33.8912743710948 2014-01-01 34.6511853842348 2015-01-01 35.5327193495667 2016-01-01 38.4021846935831 2017-01-01 35.9684456087334 2018-01-01 35.0995379486545 2019-01-01 36.3974532111461