Year	% of GDP
2001	114.662041558619
2002	115.101433195583
2003	117.889235457573
2004	119.85453354676
2005	124.862976315007
2006	131.795122403394
2007	141.268723678551
2008	150.620094082005
2009	157.33651168577
2010	168.227525346245
2011	168.299901881371
2012	167.559697290648
2013	155.735873999019
2014	155.286678703357
2015	149.655734352884
2016	150.726712125686
2017	145.920992410597
2018	142.571930572804