Year	% of GDP
1960	10.353960767916275
1961	11.032270202493615
1962	10.565648179655032
1963	10.841101324115279
1964	9.051463175017313
1965	10.301022199444377
1966	14.739021977040007
1967	13.474572699067766
1968	14.164042109970145
1969	14.509528613515846
1970	15.658215978843623
1971	17.275794249188866
1972	13.751045244873094
1973	18.20902402526835
1974	14.924739099749962
1975	12.33995787220167
1976	9.424926954305581
1977	7.007003238075948
1978	8.631944573292651
1979	12.127815954837827
1980	12.309788997449203
1981	15.795772133674005
1982	14.002951487875276
1983	11.611756318318248
1984	8.571159971530815
1985	10.590072446650028
1986	12.021356743299211
1987	15.134051752654015
1988	5.147761308673464
1989	4.089268141572674
1990	6.678882561878232
1991	10.74764206499648
1992	13.58471554856494
1993	17.788732233676885
1994	18.67561855907545
1995	19.55614302375656
1996	20.522497658171922
1997	20.74618099818455
1998	23.57257229380875
1999	24.908784666488632
2000	22.775512094937344
2001	16.26944824743189
2002	14.54896367567147
2003	18.08770410755347
2004	17.512859211459332
2005	18.272744739577814
2006	19.588605816214358
2007	24.79622425715361
2008	28.026042379596163
2009	24.85337819710938
2010	24.214437361678492
2011	23.322515388335304
2012	26.855257397408337
2013	28.62133469590942
2014	33.09081876710189
2015	33.913643103021165
2016	30.573654280864204
2017	33.4342115374413