Year	% of GDP
1970	0.526393487444465
1971	0.467467633475844
1972	0.715511999626303
1973	2.12091757548751
1974	3.12559530973294
1975	1.20949948857733
1976	0.932019080942269
1977	0.710122766760192
1978	0.33389160452515
1979	0.851044440862203
1980	0.862253656898485
1981	0.38841308174739
1982	0.83031898660431
1983	1.17612391811329
1984	1.23910537294934
1985	1.01134664670773
1986	0.144126437427604
1987	0.129560380591873
1988	2.0680261360683
1989	1.75470128661939
1990	1.02727246074634
1991	0.153187312455177
1992	0.0233024394327145
1993	0.00849672325988947
1994	0.00909211263560267
1995	0.011840510224681
1996	0.0127051362723109
1997	0.0142353372779557
1998	0.00234945171558126
1999	0
2000	0
2001	0.122281324946655
2002	0.0393012069447893
2003	0
2004	0.0273073731996834
2005	0.1475913596888
2006	0.677902472286333
2007	0.507112945978807
2008	0.126638687227696
2009	0.254646126193676
2010	0.525851263898386
2011	0.287792760238462
2012	0.333385271330321
2013	0.074510080655601
2014	0.263917349180621
2015	0.117103934760925
2016	0.161443706654027
2017	0.135931983418249
2018	0.000178346864611042
2019	0.000553274404353355
2020	0.000761747606675296
2021	0.384580133990368