Year	% of GDP
1970	1.1259743183399102
1971	1.2249640247098506
1972	1.4731922756326796
1973	1.8855230597427732
1974	7.389311437421701
1975	8.324699214677196
1976	9.698557208892202
1977	8.842881499744252
1978	9.525528031729321
1979	13.645260594584347
1980	15.724517928745907
1981	11.769934821891963
1982	7.862488970480774
1983	8.591135042457827
1984	8.820590310337657
1985	7.62401862713723
1986	4.096960688306308
1987	5.431301586868584
1988	4.474971132630567
1989	5.37998549665881
1990	6.685728374183783
1991	3.360308705988238
1992	3.548535875499316
1993	3.366350117014942
1994	2.5606682401901555
1995	2.316897117886271
1996	2.820291985255188
1997	2.3847758306389912
1998	1.251795738936696
1999	2.455136247786935
2000	4.527967671639017
2001	3.364000698193559
2002	3.353954708355335
2003	3.692903133550496
2004	4.406097608114862
2005	5.58697460021482
2006	5.650851020733432
2007	4.889396416459935
2008	5.720427470556075
2009	3.2299185367918466
2010	3.6408198431724643
2011	4.753936618890587
2012	4.406350349989249
2013	3.891517688477521
2014	3.444618967999751
2015	1.6401671299159082
2016	1.3037610915007833
2017	1.6492698500985183
2018	2.266562417611961
2019	1.920107958319048
2020	0.9941371794907455
2021	1.7252829159968257