Year	% of GDP
1972	20.69672131147541
1973	22.941213141325353
1974	19.407291356078975
1977	24.411916559822362
1978	24.505780550148913
1979	16.330887345562367
1980	18.860611836697796
1981	24.277820026974148
1982	30.82594307505893
1983	35.52266422414515
1984	31.78422885553786
1985	33.45767557527667
1986	38.613749850825805
1987	30.577555477487778
1988	39.54479386726242
1989	34.747790540318626
1990	48.04793488091649
1991	210.20513164435846
1992	92.25092092592601
1993	55.15676928601111
1994	52.16802380086818
1995	46.41417813874955
1996	41.77493079933397
1997	38.178717672999014
1998	46.50603933472459
2001	43.50467289719626
2002	41.415012942191545
2003	37.785970617920825
2004	35.27490908675721
2005	28.51245274062018
2006	34.55436977213729