Year	% of GDP
1960	0.5448272914023016
1961	0.46694898706837323
1962	0.453731369691489
1963	2.8074871607676966
1964	3.1751964772000694
1965	3.1537057606333616
1966	3.5650332233457664
1967	3.568013475778854
1968	3.962825434966926
1969	4.30684521030147
1970	5.0815759642551726
1971	5.20924529891486
1972	5.485401287444535
1973	5.5314898367324545
1974	5.757151412123056
1975	4.900950300740283
1976	4.560530163471016
1977	4.856354772234521
1978	5.875124508450795
1979	3.0175043896335834
1980	1.9895216839111989
1981	2.3741280401897797
1982	2.3633617436053864
1983	2.1265212637965942
1984	2.1019937855839963
1985	1.8570715727527305
1986	1.7954310465779384
1987	2.309885810851651
1988	1.6656788460980194
1989	1.5990623616778852
1990	1.5821433630203743
1991	1.4384757243861903
1992	2.0715769139882814
1993	3.490877551898052
1994	4.841146853899724
1995	7.544823359443965
1996	11.649261822770603
1997	13.996200855524005
1998	15.76436060675169
1999	18.919726798297916
2000	17.623859532079166
2001	17.778542377833606
2002	17.97811318553261
2003	17.495611819165983
2004	16.527256766681354
2005	18.859680247343338
2006	20.446255567595404
2007	18.522149107551947
2008	17.644647469814903