Year	% of GDP
1970	0.0115602838766326
1971	0.00309843738837228
1972	0.186200888466482
1973	1.51885780119361
1974	24.2620319664417
1975	13.1385741712754
1976	15.4202485231747
1977	16.5001923359572
1978	17.1334552526525
1979	37.9393625588413
1980	29.3499929583315
1981	17.8736388507926
1982	7.25092356913313
1983	17.9104655007995
1984	22.3319139805741
1985	24.1675969162857
1986	9.9166539586636
1987	18.2464767133142
1988	17.2879024167938
1989	31.9903938330206
1990	37.0679852946243
1991	20.7037580261964
1992	23.3587405950744
1993	27.2825783443645
1994	32.4835583497713
1995	31.3905248097934
1996	34.2466290821695
1997	38.8429815606382
1998	23.4026290591939
1999	34.4709216830853
2000	55.9533665542603
2001	43.2924415564204
2002	40.6339102482945
2003	32.8203228243625
2004	36.7574181614469
2005	44.9456173814714
2006	50.1208093428642
2007	43.9536353057112
2008	48.8603735696485
2009	32.0193923725837
2010	40.9410251641332
2011	48.6661331517592
2012	38.0875246076633
2013	29.6858074019147
2014	24.8226399767107
2015	12.2746700668843
2016	12.8004971968497
2017	25.0227768251894
2018	38.248715891351
2019	35.8517991110343
2020	22.4084125429251
2021	34.3828809069635