Year	% of GDP
1971	0.12720589577935312
1972	0.12524351484240429
1973	0.13055648370058223
1974	0.33184652381304836
1975	0.9412313145076482
1976	0.9599844639602507
1977	0.9683143157558227
1978	0.8332377051077647
1979	0.719111939766652
1980	0.9581435991767635
1981	1.4485066719345048
1982	1.692630409207959
1983	0.9590562349041593
1984	0.7527532112788784
1985	0.8634305541128501
1986	0.5265753860410438
1987	0.2194424724969316
1988	0.3715538757657739
1989	0.43737272823301904
1990	0.4994408736980102
1991	0.49447641228747763
1992	0.34677156380888974
1993	0.17095714776811147
1994	0.14083656925406254
1995	0.2546953797794362
1996	0.1682589733477672
1997	0.13610134783575872
1998	0.12839773034268295
1999	0.08617742414684759
2000	0.12764107410413802
2001	0.37379370517996363
2002	0.18734031297728865
2003	0.17936286177615904
2004	1.0290922481619016
2005	0.7607970526829955
2006	0.7707236005232483
2007	0.9155643462481088
2008	2.2135182933788697
2009	0.8714003298636656
2010	1.3188030705080809
2011	1.7359642620748499
2012	0.9633820223896469
2013	0.6424338216562844
2014	0.49875024126561784
2015	0.3068736477324185
2016	0.3292243495101027
2017	0.4215604625252672
2018	0.4865482000066851
2019	0.3698855584778258
2020	0.3074472997703541
2021	0.538491565310811