Year	% of GDP
1970	0.753701855139697
1971	0.60870723264445
1972	0.529232206730924
1973	0.421514333281308
1974	0.358592835485603
1975	0.449572315271122
1976	0.520712355293205
1977	0.472816375484958
1978	0.151410231616863
1979	0.289277785436581
1980	0.357442835656865
1981	0.248851625675764
1982	0.0453234406587562
1983	0.0388719952431731
1984	0.0559169454208194
1985	0.0920065445477483
1986	0.00376074104880916
1987	0.00780331294145515
1988	1.28089239457548
1989	1.30238069724206
1990	0.413760587138379
1991	0.568997216809207
1992	0.46725201633409
1993	0.197521069501746
1994	0.201519313925196
1995	0.522060943731005
1996	0.54055045575281
1997	0.273632762886802
1998	0.0690646560643225
1999	0.150182890936726
2000	0.758448871373936
2001	0.286976709278629
2002	0.398376406700825
2003	0.801614763360525
2004	1.41256359931533
2005	1.14142467909218
2006	2.08765491529857
2007	4.9731457818943
2008	0.989721930731839
2009	0.592984043923936
2010	1.1702972760544
2011	0.884147807708422
2012	0.326318370339285
2013	0.0536041471000662
2014	0.195859030603102
2015	0.109233697562895
2016	0.0238749644752808
2017	0.0906302871023188
2018	0.243514309322097
2019	0.261017130526117
2020	0.244316813023768