Year	% of GDP
1960	0.544827291402302
1961	0.466948987068373
1962	0.453731369691489
1963	2.8074871607677
1964	3.17519647720007
1965	3.15370576063336
1966	3.56503322334577
1967	3.56801347577885
1968	3.96282543496693
1969	4.30684521030147
1970	5.08157596425517
1971	5.20924529891486
1972	5.48540128744454
1973	5.53148983673245
1974	5.75715141212306
1975	4.90095030074028
1976	4.56053016347102
1977	4.85635477223452
1978	5.87512450845079
1979	3.01750438963358
1980	1.9895216839112
1981	2.37412804018978
1982	2.36336174360539
1983	2.12652126379659
1984	2.101993785584
1985	1.85707157275273
1986	1.79543104657794
1987	2.30988581085165
1988	1.66567884609802
1989	1.59906236167789
1990	1.58214336302037
1991	1.43847572438619
1992	2.07157691398828
1993	3.49087755189805
1994	4.84114685389972
1995	7.54482335944397
1996	11.6492618227706
1997	13.996200855524
1998	15.7643606067517
1999	18.9197318949242
2000	17.6238640309735
2001	17.778546785567
2002	17.978117689976
2003	17.5006234628474
2004	16.5291865259117
2005	18.8657892604975
2006	20.4493250657558
2007	18.5250760306452
2008	17.7101483486321