Year	% of GDP
1960	13.411078717201166
1961	12.534309240622141
1962	13.164665523156089
1963	15.340909090909092
1964	17.05796038151137
1965	19.004230393752035
1966	20.796333428816958
1967	20.56287511083288
1968	20.152349918663454
1969	27.81390809179524
1970	39.781394902603246
1971	40.86173953969051
1972	25.909925774616838
1973	14.234175139389963
1974	15.504255111024163
1975	16.887001833445915
1976	16.73619362057347
1977	18.42895648825568
1978	19.4438409732783
1979	19.98040426433883
1980	23.078274105731513
1981	26.808232215084466
1982	32.9693574205351
1983	29.726949824970827
1984	23.878448625432767
1985	18.435711462575327
1986	20.96178517280255
1987	19.31121533515101
1988	23.248477965994763
1989	25.961191187575928
1990	25.125157662050583
1991	28.014754825826493
1992	21.64574946720341
1993	18.507941073740007
1994	18.804316221543132
1995	19.535517458472565
1996	17.229452367286267
1997	15.280416972710324
1998	13.976935004356964
1999	12.102325502367412
2000	20.416384888761065
2001	21.159810701884325
2002	19.423388100038608
2003	18.151936557937088
2004	18.133666800385974