Year	% of GDP
1970	0.2910925562912428
1971	0.34562033405921516
1972	0.3821606158242038
1973	0.3784577736769033
1974	1.6480910601007484
1975	1.5398452671050566
1976	1.5087193995881083
1977	1.5390242883217247
1978	1.4625726028083457
1979	2.667632764251716
1980	3.309215230076905
1981	2.217609227841816
1982	1.3495681894974987
1983	1.6197047296941853
1984	1.3600484665076398
1985	1.2972596630647595
1986	0.5246029358591471
1987	0.7506904621933356
1988	0.47110611955753356
1989	0.5910840444241844
1990	0.7743185069439051
1991	0.5248142320391104
1992	0.4954808426521603
1993	0.3994802447223312
1994	0.3418033404860672
1995	0.34976310706297037
1996	0.4196805723990071
1997	0.24630232054942794
1998	0.09355482830623972
1999	0.20366685286760045
2000	0.38624505068503334
2001	0.2143660226315586
2002	0.2236995631744299
2003	0.27796069248817246
2004	0.37718454832386106
2005	0.4690409104630364
2006	0.47552275517700077
2007	0.4892482074526232
2008	0.7132404847035099
2009	0.3524291717672216
2010	0.3971100329939769
2011	0.5027638030391692
2012	0.27328314057492514
2013	0.39863898954853777
2014	0.3732945906438562
2015	0.00964396683345096
2016	0.12076818855011505
2017	0.2132043441079228
2018	0.4105685507669055
2019	0.4621901668727303
2020	0.23808347664645554
2021	0.785201336995911