Year	% of GDP
1960	18.3586877844856
1961	19.504575191689
1962	21.0961617250329
1963	21.9605190478274
1964	23.6676038218552
1965	32.0006300593106
1966	32.4005862010705
1967	33.9453161670748
1968	35.1193453380961
1969	37.0177858141953
1970	38.7005099006147
1971	37.9717592366193
1972	38.8229056366796
1973	36.945185773837
1974	24.5372085330671
1975	32.4432225812915
1976	34.4785980413052
1977	39.5896600506887
1979	51.3817010396054
1980	61.3836164057268
1981	67.6036500552997
1982	69.0386309719759
1983	63.4595751026002
1986	75.39411444946
1987	77.8763999127763
1988	78.4916323782169
1989	76.5935701376936
1991	70.0977681741677
1992	65.9018370203221
1993	61.7263081204024
1994	59.5883779795221
1995	57.2607406709223
1996	53.5946649503257
1997	55.5007943949708
1998	61.2708078964284
1999	61.3050442223473
2000	60.3471451747752
2001	62.161072925273
2002	61.0687202956015
2003	58.1354529803333
2004	48.9304005435135
2005	42.7197655037469
2006	41.0333765870776
2007	39.2275763802396
2008	34.0208444460196
2009	42.0520803321559
2010	43.818200121647
2011	46.7754878649998
2012	47.0999442266967
2013	47.3414240080852
2014	55.7206934333229
2015	71.1634155120215
2016	85.3557549991078
2018	67.5368074059021