Year	% of GDP
1971	0.293381109229178
1972	0.6100628326499213
1973	0.9791134437432831
1974	9.089572025877589
1975	6.210919316300594
1976	6.881780082014497
1977	7.754254888384722
1978	5.985610755377606
1979	15.297402525248353
1980	8.893676481438474
1981	2.7830392396016057
1982	1.3566365047001745
1983	2.6827045205446445
1984	3.519043145996873
1985	3.9679820358229847
1986	1.3752191826619686
1987	2.47724069751204
1988	2.056282501037901
1989	4.187287846125573
1990	5.867846094295014
1991	3.6467130106129386
1992	4.311582475376643
1993	6.5666562048990755
1994	7.3584415404506425
1995	6.67782640064216
1996	6.8928189419479535
1997	6.125635138981013
1998	3.1611064582073
1999	2.6124034565662053
2000	5.304525324412659
2001	4.004878188594778
2002	3.6534926904909106
2003	3.7787667498370463
2004	4.839370956442412
2005	6.591388208015006
2006	6.480851303537742
2007	5.986102809648364
2008	7.373622835704449
2009	3.7042129888880355
2010	5.088474202540722
2011	6.8406282976890775
2012	5.048971105114571
2013	3.9245833368059935
2014	2.996867769101918
2015	1.0674889860131105
2016	0.7887822970252907
2017	1.4199975670665619
2018	2.1348563037522563
2019	1.9022482638025122
2020	0.9547008004996204
2021	1.753300341445839