Year	% of GDP
1960	38.4020618556701
1961	36.1668003207699
1962	35.0152905198777
1963	37.4908290535583
1964	28.2530553558591
1965	33.2519829164124
1966	37.3118279569892
1967	34.9027635619243
1968	39.1581008321096
1969	39.5936794582393
1970	39.1573729863693
1971	35.4743083003953
1972	37.9416282642089
1973	37.5824175824176
1974	38.9599133261105
1975	45.8939022087974
1976	38.8725490196078
1977	34.6291208791209
1978	41.1140252279256
1979	40.8328513591672
1980	38.8021092428614
1981	31.4953524050176
1982	28.8455362877328
1983	28.3228968909462
1984	26.4261465635555
1985	29.8987094452157
1986	25.0487993100005
1987	27.8098809842716
1988	32.5430087143504
1989	34.517570633006
1990	33.4207674228863
1991	29.3073102812389
1992	42.4558332940969
1993	32.2219709467794
1994	61.7451352243623
1995	48.088417296414
1996	31.8766701229303
1997	33.5854046163355
1998	38.1050151948843
1999	43.2936924901362
2000	35.3349830139486
2001	39.1271773250864
2002	26.0402006169066
2003	30.6719928909512
2004	32.617992389861
2005	39.326828871029
2006	36.7261332741394
2007	33.1327199442831
2008	39.3090102751955
2009	31.6544190196987
2010	34.860459245346
2011	28.0106925012198
2012	41.6781946295397
2013	42.6093327380537
2014	39.6250438964386
2015	35.7547547277185
2016	44.9407964726541
2017	36.1670266760313