Year Percent of GDP 2004-01-01 20.0889996935848 2005-01-01 19.8708211835470 2006-01-01 21.2496153589178 2007-01-01 22.3266186949459 2008-01-01 26.0258658182367 2009-01-01 23.0171351462555 2010-01-01 22.1469347874535 2011-01-01 22.1222620344304 2012-01-01 25.3310791248735 2013-01-01 25.1654761066646 2014-01-01 24.3301628301976 2015-01-01 27.3610630735302 2016-01-01 30.7644876177270 2017-01-01 27.8600907923174 2018-01-01 30.2166178814374 2019-01-01 30.1319109516234