Year	% of GDP
1970	0.042178677146058476
1971	0.041852993434537265
1972	0.03896189700673808
1973	0.04348627589523194
1974	0.06762300548858921
1975	0.1330132152174862
1976	0.13983109144199155
1977	0.1278380993341235
1978	0.1642286307997356
1979	0.25422513389708673
1980	0.21880791869010696
1981	0.12115179724317045
1982	0.04402117600882519
1983	0.17621661964441734
1984	0.20311384842337887
1985	0.21232953412421024
1986	0.25063062635251615
1987	0.29242877446317456
1988	0.38796492575572167
1989	0.37650887915748243
1990	0.49786971801834334
1991	0.39334818440515373
1992	0.2763999989914738
1993	0.4216125803521937
1994	0.39522597340710536
1995	0.49822587339901075
1996	0.47925083569785487
1997	0.4850331807673937
1998	0.24439084796554145
1999	0.2890710785727733
2000	0.5884131257213822
2001	0.8364224381017118
2002	0.7010583622752109
2003	0.7173801619528918
2004	0.6272384075641666
2005	0.5856046424849289
2006	0.7473269376078102
2007	0.6241928804762716
2008	0.7790274948608404
2009	0.6273968279498745
2010	0.5240951955449688
2011	0.6612699274386368
2012	0.6440283093512418
2013	0.6069654023355855
2014	0.5175848918041831
2015	0.4445050531641911
2016	0.3061721395381042
2017	0.3506002438678732
2018	0.5368634805111792
2019	0.4706482709145309
2020	0.3462649545250455
2021	0.7503237445842487