Year	% of GDP
2002	5.827472495911967
2003	4.840099003742323
2004	5.343727231712859
2005	4.718087742642535
2006	2.289435990207917
2007	2.7207625168135214
2008	4.417549480570224
2009	5.6512845319972795
2010	4.30096939943884
2011	5.065915485816493
2012	5.001565170662309
2013	4.234477660110819
2014	3.6136561818655144
2015	3.8092876159059768
2016	3.817190288182967
2017	4.246438081433538
2018	3.2655413424427158