Year	% of GDP
1970	0
1971	0
1972	0
1973	9.57242263017444
1974	46.9068792832219
1975	10.0626455554942
1976	7.32083922081218
1977	3.10559857246863
1978	2.5059324987033
1979	6.01652181680354
1980	3.48858392891549
1981	1.7862101774669
1982	2.23323891237053
1983	0.946189403167902
1984	4.54112135790745
1985	2.68697431917588
1986	0
1987	0.16247368548421
1988	22.3853874414571
1989	24.5244795530077
1990	7.24907158855956
1991	0.63899830292587
1992	1.16790498034521
1993	0.623495418776082
1994	0.60645279484504
1995	0.479617507266306
1996	0.318340880243805
1997	0.861887024483636
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0.224900454263183
2005	0.335434255722259
2006	0.809512759350298
2007	0.672343416976473
2008	0.844947976042771
2009	0
2010	0
2011	0.114611409396534
2012	0.353875743048762
2013	0.0190935869044509
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0