Year	% of GDP
2005	16.07376605312582
2006	15.951094041144549
2007	16.6639442645017
2008	16.01365225961762
2009	16.529121297581
2010	16.19185328310742
2011	15.811655479947426
2012	16.0282533381517
2013	14.163675217185254
2014	15.656446364665003
2015	15.719931207082505
2016	16.067022627221768
2017	16.12200568137712
2018	14.47828742857363