Year	% of GDP
1970	0.37691871539296673
1971	0.43951180148838204
1972	0.5174926960150402
1973	0.6722486727423934
1974	2.884579348371677
1975	2.4989566611495775
1976	2.751088333323762
1977	2.686090243626574
1978	2.342601560683274
1979	4.14523937674266
1980	4.713236173213931
1981	3.5922509432008636
1982	2.3552409991859538
1983	2.5560699823178163
1984	2.484549816457439
1985	2.260016895171915
1986	0.9351201768799553
1987	1.2136732387912492
1988	1.010886968093369
1989	1.4503728375781157
1990	1.8447865705193491
1991	0.9465560035389161
1992	0.9398457001567226
1993	0.9958409080760318
1994	0.8865992538993674
1995	0.8879078306098239
1996	1.1254978385405054
1997	0.989911057409715
1998	0.5359712790489206
1999	0.8306185532500792
2000	1.5556937445498917
2001	1.171357438359022
2002	1.1517178849191312
2003	1.2456705190856798
2004	1.5739283860018867
2005	2.170969448015145
2006	2.375287472221944
2007	2.2791697705892275
2008	2.970462589355391
2009	1.6508392108255938
2010	2.0434229843336884
2011	2.786902889530461
2012	2.657532389939546
2013	2.4276825773690325
2014	2.1455602977772705
2015	0.9812646898320238
2016	0.8235014770675161
2017	1.0939838153697363
2018	1.531447379622198
2019	1.311264828398705
2020	0.6956396760140413
2021	1.3366213408455239