Year	% of GDP
1970	0.05116388383004976
1971	0.056213047328189575
1972	0.1959362440764499
1973	0.5899733281658706
1974	4.076616867325426
1975	4.171704766284798
1976	5.206425851724986
1977	5.494239240641223
1978	5.89419853754071
1979	12.702850576507492
1980	12.331517549575109
1981	9.266539558789916
1982	5.602725141294429
1983	6.527782284843529
1984	6.462231364273131
1985	5.809571533694133
1986	2.8883625518857468
1987	4.354086399751864
1988	3.0040067775608192
1989	4.15126888273498
1990	5.43224266281665
1991	2.9704173544898476
1992	2.9121098316277143
1993	2.6338958513341884
1994	1.8842336540762303
1995	1.6744541691110562
1996	1.89988610441202
1997	1.5855477279893442
1998	0.8247148229184058
1999	1.3588323791740455
2000	2.542383056443665
2001	1.7005732742059734
2002	1.5657431493298524
2003	1.5988052775367168
2004	2.0494191832943853
2005	2.7418429740911328
2006	2.675842320003695
2007	2.1189179828549043
2008	2.447069518859518
2009	1.1255347479308
2010	1.4562171765422882
2011	1.8277610093089058
2012	1.531002198218967
2013	1.2836460248725636
2014	1.077101925844377
2015	0.42029059792183626
2016	0.3151922122253028
2017	0.4021360844876319
2018	0.5247890511386463
2019	0.369757252329704
2020	0.13870474132269564
2021	0.3698002256881652