Year	% of GDP
1975	0.13150687953385706
1976	0.14099941691280868
1977	0.39589815279530566
1978	0.40596558296136787
1979	1.6714158368930496
1980	1.2642507226028925
1981	2.8295062326792806
1982	4.034077199428141
1983	9.377194045234292
1984	7.756496622186326
1985	9.46321874421359
1986	11.24532785072849
1987	10.703479978711433
1988	9.01589440239402
1989	8.274622333427864
1990	5.982596015947336
1991	7.488156770686611
1992	10.006361975788987
1993	19.068919346654994
1994	38.63498757315857
1995	37.15732768798384
1996	44.72057156029797
1997	56.99273811438555
1998	73.7674009126738
1999	78.38041719730765
2000	144.21968334261433
2001	123.71431149256848
2002	69.54010582742185
2003	59.35223262220687
2004	80.44297173833314