Year Percent of GDP 2004-01-01 2.7186 2005-01-01 2.4426 2006-01-01 2.3599 2007-01-01 2.8795 2008-01-01 2.9605 2009-01-01 3.9653 2010-01-01 4.2737 2011-01-01 4.1141 2012-01-01 4.2637 2013-01-01 4.4483 2014-01-01 4.9799 2015-01-01 5.4534 2016-01-01 6.1450