Year	% of GDP
1960	8.93005176011308
1961	13.62861303385
1962	15.0549713439345
1963	14.0738742642577
1964	16.2239127788557
1965	17.9197126636425
1966	18.575998999289
1967	18.2972571243843
1968	19.7737459094134
1969	29.8179942636923
1970	32.3610179487642
1971	33.7998395311794
1972	34.9122980818242
1973	41.4959934071719
1974	31.68088168921
1975	29.3357632262959
1976	33.8015471095331
1977	28.4705513495036
1978	26.1677239806078
1979	27.4806102589563
1980	23.2362024089304
1981	27.6018736352725
1982	39.129133891322
1983	52.6962915587678
1984	50.6986655083673
1985	51.7124247516286
1986	61.440578857993
1987	59.3002106326998
1988	64.6431160715577
1989	59.2525558369622
1990	52.7146264239014
1991	51.7448684234345
1992	52.3573888076903
1993	48.476556973731
1994	43.6391309212715
1995	45.449763829446
1996	47.3196864338288
1997	48.1553009788171
1998	50.4300498637172
1999	49.7909276787143
2000	47.9999122940477
2001	56.3142522878957
2002	57.4634286924259
2003	55.8474447277358
2004	52.7968496504301
2005	52.3434066176535
2006	50.0191706230834
2007	48.8261553507447
2008	45.4285625026291
2009	59.8080223376496
2010	52.83558638772
2011	47.7210657824564
2012	56.2962392922553
2013	56.7350650956776
2014	56.7221312346365
2015	59.7073679044943
2016	64.2648246842003
2017	66.5263533309345
2018	51.3309255086171