Year	% of GDP
1970	0.015223770690244175
1971	0.02816035584257333
1972	0.02573560615110566
1973	0.026981570203047214
1974	0.030710302081270374
1975	0.03159834795014625
1976	0.0463106702600636
1977	0.0640477875058404
1978	0.04661702022215124
1979	0.037757388523840134
1980	0.04644016641354518
1981	0.05216145877660304
1982	0.0001191574963471342
1983	0.023363982400853498
1984	0.020586155161995707
1985	0.02045425436735133
1986	0.012249399400126836
1987	0.05364929048804991
1988	0.05040373630414738
1989	0.058392900094363716
1990	0.0582420854700065
1991	0.07546431723373917
1992	0.08166449108586231
1993	0.10864828483410749
1994	0.10885702300540454
1995	0.09547894770652651
1996	0.09251997579641573
1997	0.11777292843590907
1998	0.04636573903859521
1999	0.13280894051383685
2000	0.16656962581671947
2001	0.23852915084735543
2002	0.19191235162226267
2003	0.406000983363183
2004	0.41437087818603274
2005	0.46186193492078476
2006	0.5306369505143216
2007	0.652506508279592
2008	0.7910841266351627
2009	0.9089616935699251
2010	0.8190550801685612
2011	0.7637587251298231
2012	0.7771256682786151
2013	0.7831770008655079
2014	0.7837336719596635
2015	0.6958343478979958
2016	0.5750397864727765
2017	0.5631610527119448
2018	0.556612066431604
2019	0.6002842898931346
2020	0.5690969937336641
2021	0.48717416743473313
2022	0.5571447439962717
2023	0.6219926859664173