Year	% of GDP
1970	0.025594989512410495
1971	0.017585195754030194
1972	0.015561663402817564
1973	0.03633290450053686
1974	0.04538458738359806
1975	0.01244144271914611
1976	0.02004621669155552
1977	0.01607384377807946
1978	0.009065420320942019
1979	0.015324335093460087
1980	0.0197608783760415
1981	0.012252974983270552
1982	0.011118162012566699
1983	0.010357527328213838
1984	0.007018027020762307
1985	0.005883794746673668
1986	0.003025752884044613
1987	0.0029238489219912296
1988	0.024959596169907776
1989	0.028776184152655402
1990	0.009007737923534017
1991	0.0076805466830376316
1992	0.007216446583772984
1993	0.004179363019720689
1994	0.004734179847922161
1995	0.004307694042981742
1996	0.0021417807493246434
1997	0.0027499478313487147
1998	0.0011633263483152786
1999	0.0015336955911449237
2000	0.0022274194216438475
2001	0.0007596528603715881
2002	0.0009522538904895236
2003	0.0007500579126091249
2004	0.0030758418681748976
2005	0.004910027897823946
2006	0.015189925460175608
2007	0.018556474339561944
2008	0.008150416133702942
2009	0.003875637416963657
2010	0.011626968942498919
2011	0.013173454293556314
2012	0.013893009599839435
2013	0.008708653468392063
2014	0.006449895196909781
2015	0.0036474474128467636
2016	0.003962600819789383
2017	0.008197377399122683
2018	0.007895132168938557
2019	0.01291838656605038
2020	0.013457210454196076
2021	0.016360445939463147