Year	% of GDP
1960	10.3092783505155
1961	12.7506014434643
1962	8.33333333333333
1963	9.83125458547322
1964	7.69230769230769
1965	13.9719341061623
1966	17.4193548387097
1967	13.510747185261
1968	16.1037689672051
1969	18.3747178329571
1970	25.7331681123503
1971	19.1699604743083
1972	24.3932411674347
1973	22.3901098901099
1974	27.3239436619718
1975	33.7171984141967
1976	26.2581699346405
1977	24.6840659340659
1978	38.4413638066692
1979	30.2371312897629
1980	24.7438065864093
1981	17.6247631080227
1982	21.4033397559409
1983	22.7974963672579
1984	12.8792323344988
1985	18.5870738855468
1986	12.4699260066276
1987	17.270674677586
1988	21.4180624717067
1989	24.5567664317207
1990	23.0404656656803
1991	20.2357051700495
1992	19.9346121331022
1993	15.1712256157594
1994	29.0981814658405
1995	17.3921391917208
1996	12.3270860845052
1997	11.5988120124276
1998	13.4650222875455
1999	14.6500072864209
2000	13.5646985794757
2001	14.8965295316285
2002	12.3035963814326
2003	12.9223403659425
2004	13.7546861770147
2005	17.0947537680302
2006	20.0140416855367
2007	23.069128072365
2008	23.2291205433028
2009	24.462885323879
2010	22.8231860924044
2011	12.4247740298105
2012	12.0494054442508
2013	12.7024580393953
2014	11.9855600999476
2015	12.2216244181233
2016	10.7802797933837
2017	13.4322200241966