Year	% of GDP
1970	8.80478953828317
1971	6.66692828417963
1972	7.16171548895926
1973	10.62718599286
1974	9.72443659264343
1975	10.9064338364906
1976	9.80366902148694
1977	14.3710418710117
1978	18.5212570758175
1979	20.9013499219011
1980	44.6568514789293
1981	36.7308035256211
1982	31.2139734791776
1983	20.0856216064087
1984	11.4624131489679
1985	8.93281206376038
1986	12.7378972321606
1987	7.78871224675071
1988	8.15709709204748
1989	10.3293805450757
1990	15.8107071000485
1991	20.6020937391219
1992	25.2354992448034
1993	19.4993042079813
1994	19.0034403813129
1995	19.509460753546
1996	18.5824681208781
1997	16.8500438638723
1998	16.7918484266104
1999	12.463772500312
2000	12.0494143938765
2001	12.4643931713023
2002	14.2481201571521
2003	20.8852302359366
2004	15.1925629839147
2005	13.9239561199514
2006	13.2519669621419
2007	16.1640796388529
2008	16.4379945980784
2009	9.46245873827469
2010	8.10229439370414
2011	9.15620849237058
2012	10.6585708011681
2013	10.6586103842094
2014	10.3312319703494
2015	10.7947576138514
2016	12.7336513052995
2017	12.1305147407764
2018	8.38888217833344
2019	7.38833937837014
2020	7.56349041713714
2021	7.47552032336567