Year	% of GDP
2006	15.648963632222305
2007	16.256339488973463
2008	14.618748534891804
2009	16.845891707686484
2010	16.728791821979556
2011	17.365849331371926
2012	18.444737423696264
2013	19.858778058569943
2014	20.466708417546755
2015	21.348776361481928
2016	19.08189893432402
2017	24.078426916822306
2018	27.390712206585306