Year	% of GDP
1970	0.9108749593875968
1971	0.8790866812331825
1972	1.017902114894856
1973	1.568690759103887
1974	1.2121897907866563
1975	1.3275643776238686
1976	1.267675144961319
1977	1.644461890153747
1978	1.5362592488628561
1979	1.5257772726448464
1980	1.4642125183149062
1981	0.9680824742539073
1982	1.336106897571858
1983	1.0368208060190942
1984	0.7558365562393984
1985	0.6737360099846217
1986	0.9147297970374751
1987	0.9984021837816152
1988	0.9653162205390285
1989	0.9705751117452941
1990	0.885296338407442
1991	0.9880741279385437
1992	1.0046304876743086
1993	0.9056951669492556
1994	0.8578693864072604
1995	0.9977008822290301
1996	0.8864376185416464
1997	0.7457851522283574
1998	0.701140077299082
1999	0.48797091343208365
2000	0.43179544973617023
2001	0.42301568038621645
2002	0.4698000263526189
2003	0.5663162048122365
2004	0.40146688240614714
2005	0.36405015926426737
2006	0.3803966515117462
2007	0.4246611180029838
2008	0.44849852436803195
2009	0.4091320620409185
2010	0.4020375281071599
2011	0.35907258374017265
2012	0.34642583187891796
2013	0.3366706045001073
2014	0.3701258695148549
2015	0.33218607787728943
2016	0.3501700976077516
2017	0.3536373955363427
2018	0.29164929180987464
2019	0.26294868903370827
2020	0.2879975864522391
2021	0.23990487242155786