Year	% of GDP
1964	0.8086253369272237
1965	0.7653061224489796
1966	1.9753086419753085
1967	3.543586109142452
1968	3.873319662793347
1969	3.8200339558573853
1970	4.276985743380855
1971	4.387568555758683
1972	4.501607717041801
1973	4.637336504161712
1974	4.682926829268292
1975	5.063291139240507
1976	4.8286604361370715
1977	4.283164782867341
1978	4.357204486626403
1979	7.76000818665575
1980	7.678667063373997
1981	8.281758530183728
1982	5.28970793248885
1983	7.188936861815456
1984	8.156844426151562
1985	6.124734586650026
1986	7.912553594096747
1987	7.827685057098985
1988	9.571783019324878
1989	9.595347766148253
1990	9.52392864049156
1991	8.596050048121612
1992	8.745362238222988
1993	9.516256305790371
1994	8.861841767929029
1995	8.951490231840259
1996	8.87778003896975
1997	10.201867862065685
1998	10.922991184823164
1999	11.1193925763984
2000	13.620897070225652
2001	20.513511406433153
2002	24.55781583676394
2003	22.66208954275054
2004	23.028169590479674
2005	19.98529000261278
2006	21.824096562468338
2007	22.239660914927295
2008	21.228547482189786
2009	17.506221826952313
2010	13.084720050657191
2011	12.782646529998557
2012	11.451511416687914
2013	10.939568213141689
2014	12.250538441436035
2015	15.133028792121225
2016	16.663076684243563
2017	15.236709846658913
2018	16.631307801879665
2019	17.21967273149253
2020	16.350992596681248
2021	16.562158956336916
2022	15.378208903346891
2023	14.023657947075469