Year	% of GDP
1960	23.3523315605923
1961	23.5472004554715
1962	21.9423085368596
1963	21.3921649757895
1964	21.2299777863603
1965	21.480340757304
1966	21.3033485865159
1967	23.1256619783078
1968	24.3806398805928
1969	27.8370303376098
1970	29.8849218143418
1971	32.3849667598639
1972	35.85624847382
1973	38.1818929112334
1974	37.4950234764389
1975	41.3843781816697
1976	42.6690482634837
1977	43.2785850417584
1978	38.9000972128554
1979	40.1793227848011
1980	37.387294284552
1981	41.5516375740261
1982	48.9992608133007
1983	49.809536648481
1984	46.563200250659
1985	46.3028397146258
1988	96.0719618714735
1989	127.879343065277
1990	57.0000606474828
1991	55.8224299273426
1992	62.4775306637463
1993	74.7074042027665
1994	50.8105041013269
1995	43.5371837412065
1996	41.9230980840799
1997	45.7312230672868
1998	48.446793149537
1999	47.5800303744038
2000	45.8366656505137
2001	45.9683782264308
2002	48.7562286927597
2003	48.235879328538
2004	46.0776930507714
2005	47.5544143411727
2006	50.730201199271
2007	54.0902801544988
2008	53.4966145091726
2009	58.4170476009696
2010	60.3678285400878
2011	62.6432129254311
2012	65.0658485027176
2013	65.9693673347665
2014	68.078695506264
2015	67.8136296141274
2016	70.9204213059373
2017	71.8067053129712
2018	75.2463142616569