Year	% of GDP
1970	0.051163883830049744
1971	0.05621304732818958
1972	0.19593624407644986
1973	0.5899733281658706
1974	4.076616867325426
1975	4.171704766284798
1976	5.206425851724988
1977	5.494239240641222
1978	5.89419853754071
1979	12.702850576507492
1980	12.331517549575109
1981	9.266539558789916
1982	5.602725141294428
1983	6.527782284843531
1984	6.462231364273132
1985	5.809571533694132
1986	2.888362551885747
1987	4.354086399751864
1988	3.0040067775608192
1989	4.15126888273498
1990	5.432242662816648
1991	2.970417354489848
1992	2.9121098316277148
1993	2.633895851334188
1994	1.8842336540762301
1995	1.6744541691110564
1996	1.8998861044120199
1997	1.5855477279893442
1998	0.8247148229184058
1999	1.3588323791740455
2000	2.542383056443665
2001	1.7005732742059736
2002	1.5657431493298524
2003	1.598805277536717
2004	2.049419183294385
2005	2.7418429740911345
2006	2.675842320003694
2007	2.1189179828549047
2008	2.4470695188595184
2009	1.1255347479308002
2010	1.4562171765422882
2011	1.8277610093089056
2012	1.5310021982189672
2013	1.2836562463054275
2014	1.077110280776189
2015	0.4202932784692038
2016	0.315194473359726
2017	0.4021390434719737
2018	0.5247931877183561
2019	0.36975994438024723
2020	0.13870573157577382
2021	0.3698033419558388