Year	% of GDP
1970	0.7925189813950325
1971	0.7709248610324495
1972	0.9064921518791317
1973	1.39668553793576
1974	1.0702094592671403
1975	1.1833187052478933
1976	1.131658504561518
1977	1.4006061433847394
1978	1.2968345673040795
1979	1.340444071167536
1980	1.2600218760808917
1981	0.8583782092321031
1982	1.181007052595925
1983	0.9209674278235708
1984	0.6426875071522782
1985	0.5846338156525895
1986	0.7657784255289368
1987	0.8709202006789126
1988	0.6423630070897866
1989	0.6999994346949128
1990	0.6251197324736534
1991	0.6893242313564598
1992	0.8504986613217351
1993	0.7322018499258862
1994	0.6332377236845833
1995	0.6810536381014649
1996	0.5965742924014301
1997	0.503412726939732
1998	0.44361212099904407
1999	0.40505949255947643
2000	0.3588102900509085
2001	0.3481510545052203
2002	0.3748471793677529
2003	0.4263998906323699
2004	0.3078691270526465
2005	0.2792973461537176
2006	0.30043238015637763
2007	0.3265196768908135
2008	0.3301210803626004
2009	0.3020829918513481
2010	0.3161818044811417
2011	0.2790459981404079
2012	0.26415020138391593
2013	0.2574440682500424
2014	0.2826085512727937
2015	0.2569247595226438
2016	0.26941688417464343
2017	0.2822263089997475
2018	0.2527297256335506
2019	0.22536172015020256
2020	0.24814729727837934
2021	0.20048290352090545