Year	% of GDP
1970	37.332536905879344
1971	43.65485948477784
1972	36.92588535962057
1973	46.328446502057915
1974	61.03972477873521
1975	52.328711974436004
1976	57.36982643524722
1977	56.1981496022671
1978	56.678067550235376
1979	62.45343505981804
1980	63.48735312953808
1981	31.619208770677737
1982	26.35138855026093
1983	24.620869978607278
1984	25.663704650571624
1985	25.14488602299541
1986	16.501501501501615
1987	23.222159090909223
1988	19.687426024845465
1989	21.965023348801306
1990	7.698318328520497
1991	1.29041072656861
1992	0.5824075393281464
1993	0.07554868397612413
1994	0.035565990711837206
1995	0.005376759307383191
1996	0.009161773696006258
1997	63.847008946578654
1998	77.89898864859097
1999	77.63488340878799
2000	75.7037742203896
2001	65.2733913946118
2002	70.57005151709383
2003	77.39271820525346
2004	56.27090853057406
2005	54.34787058007522
2006	51.03194340967321
2007	45.89983917339569
2008	50.32830722158289
2009	39.40011025633141
2010	39.416829214280035
2011	44.41752303928194
2012	44.50843536123815
2013	39.66353653520257
2014	38.94172645147786
2015	34.51414644109558
2016	28.108523679298585
2017	33.91606341349788
2018	40.802642026531764
2019	38.05186819888379
2020	27.75027730144363
2021	37.32165283404568