Year Percent of GDP 2004-01-01 12.6657777075219 2005-01-01 11.3019320339503 2006-01-01 12.1847361178264 2007-01-01 15.6505400776034 2008-01-01 16.5286474639950 2009-01-01 14.3459268321795 2010-01-01 17.8595285052144 2011-01-01 15.9562526578434 2012-01-01 13.2377225986257 2013-01-01 15.5109683149495 2014-01-01 15.8396588360805 2015-01-01 17.6321555151589 2016-01-01 16.3372963488909 2017-01-01 18.4360899896497 2018-01-01 20.0345950719044 2019-01-01 21.2248335589694