Year	% of GDP
1990	53.19993469435772
1991	49.52706311401713
1992	45.39188002884656
1993	43.376463422650744
1994	42.05797708772138
1995	41.95162014709121
1996	43.0935194214281
1997	44.711963671281
1998	51.716436204263246
1999	56.39406569758395
2000	60.36672251646177
2001	58.18435232720914
2002	56.13300403523771
2003	61.88803389964983
2004	58.581337864570216
2005	61.910327001525744
2006	68.02051447874447
2007	72.17438871664648
2008	67.91747838432441
2009	56.07715703322748
2010	68.16848239379391
2011	66.8445220722878
2012	63.753391309775665
2013	58.87234350468806
2014	58.95779793464777
2015	60.046796095430835
2016	58.02961614683893
2017	58.92818262212835