Year	% of GDP
1970	0.29124521455802416
1971	0.2850583898113055
1972	0.2504576369578882
1973	0.26367823778113075
1974	0.16053199451628802
1975	0.3875810403930969
1976	0.3522671341456109
1977	0.3641086015440225
1978	0.4128465663558073
1979	0.6592030498352963
1980	0.2906582666182958
1981	0.35245804024122873
1982	0.14158889588692603
1983	0.5081434120781764
1984	0.48812703800043483
1985	0.4685574896292153
1986	0.4446521810496976
1987	0.5296942215811159
1988	0.6371919370801087
1989	0.6733863138386758
1990	0.5387631085127039
1991	1.0329314823185674
1992	0.9290369500255568
1993	0.9917211319098392
1994	1.0375988703917973
1995	1.1055888425157132
1996	1.1727816446679795
1997	1.3256044243377425
1998	1.272448184802653
1999	1.2299302352155954
2000	1.5645249286944722
2001	1.8521203195465614
2002	1.7392518164760042
2003	1.5947691384414566
2004	1.4840935384700007
2005	1.9222178712143887
2006	1.9744965459237296
2007	1.7041871290325368
2008	1.5058755737488623
2009	1.7514996231268767
2010	1.4572818706760213
2011	1.6004630742622166
2012	1.6083640429568529
2013	1.7523963007040586
2014	1.730471201015361
2015	1.4104333548299042
2016	1.1132768346078898
2017	1.4321941266505653
2018	2.5389962693209447
2019	2.539605783360687
2020	2.7740231122310886
2021	3.9651573531951407