Year	% of GDP
1960	8.47878302642114
1961	12.8843221743454
1962	14.954893384363
1963	12.1558341369335
1964	9.36695511087074
1965	10.5490196078431
1966	10.5078337555118
1967	16.1671362217315
1968	23.8149264314838
1969	29.5701433157014
1970	30.0220409331616
1971	32.1978562898669
1972	34.0294380017841
1973	34.5276865874671
1974	38.1084785339915
1975	38.0016372999781
1976	33.7596786279244
1977	32.4023908899964
1978	35.020401149338
1979	36.834063236175
1980	42.6578805359844
1981	44.7761535966264
1982	48.5590042667248
1983	47.3142475395946
1984	46.4446102785156
1985	48.9169941173504
1986	47.9478045015623
1987	47.1153588580832
1988	43.5613305440144
1989	47.1991279247545
1990	49.0077754393632
1991	49.4686809791809
1992	48.2146059134752
1993	47.7704171621134
1994	47.9402503782227
1995	46.6732458732498
1996	49.9670574601032
1997	54.942923228957
1998	61.8666640736063
1999	66.2502374873629
2000	70.9397394080398
2001	128.066159142961
2002	134.158901323978
2003	128.437366886529
2004	121.432123626379
2005	125.451757577458
2006	138.512615746563
2007	143.579244842454
2008	158.74549589395
2009	157.35057277549
2010	151.040820653944
2011	153.165399747004
2012	155.845025183006
2013	155.803323162955
2014	162.294359695341
2015	165.957139821212
2016	169.630377168523
2017	170.056468495552
2018	176.879846688679