Year	% of GDP
1971	0.00299872487826176
1972	0.00318867495164581
1973	0.00380272847044359
1974	0.00882588142437237
1975	0.0205793059878237
1976	0.00140448269187486
1977	0.000610196618145825
1978	0
1979	0.000246986020013706
1980	0.000177158432469133
1981	0.00020877815635154
1982	0.00124030623916838
1983	0.0015176309464654
1984	0.00117620626237354
1985	0.000920873661338101
1986	0.000336349392570525
1987	0.000288505848988185
1988	0.000154779719589013
1989	0.000204531645958469
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0