Year	% of GDP
1960	12.609012292585742
1961	13.585708827484078
1962	12.601956928384704
1963	13.572526654906433
1964	14.648078034595915
1965	15.931986383682945
1966	16.463861087621677
1967	16.508125319701723
1968	17.88408497045868
1969	19.14968211739687
1970	16.81164290164594
1971	16.282678116091926
1972	17.9373310189898
1973	18.016812246361717
1974	12.681186937875045
1975	16.764430178830935
1976	17.527856332160887
1977	18.773356198223475
1979	21.498531042746272
1980	20.629872237485323
1981	21.505466895950168
1982	24.29042176151496
1983	26.401224367601973
1984	27.223242879634824
1985	29.058802690897426
1986	32.72875562577237
1992	20.572730448824966
1993	21.554712182546567
1994	23.11903049769108
1995	30.570448756121493
1996	30.080982231338638
1997	32.26081154456148
1998	37.67048151405334
1999	37.98933876132269
2000	38.138798711754085
2001	40.76241194543492
2002	41.238931718215106
2003	39.824147805103436
2004	38.42072371069453
2005	38.968132059377744
2006	38.849566937141155
2007	40.22523300983763
2008	39.485658496598894
2009	44.24785302330851
2010	43.79977995380124
2011	41.329670508359605
2012	40.45272321907852
2013	40.83254844286013
2014	44.16112372967345
2015	52.162059216808586
2016	58.12662177406376
2017	55.94532260663798