Year	% of GDP
1970	0.29124521455802416
1971	0.2850583898113055
1972	0.2504576369578882
1973	0.2636782377811307
1974	0.16053199451628802
1975	0.3875810403930969
1976	0.3522671341456109
1977	0.3641086015440225
1978	0.41284656635580713
1979	0.6592030498352963
1980	0.2906582666182959
1981	0.3524580402412286
1982	0.14158889588692605
1983	0.5081434120781761
1984	0.48812703800043483
1985	0.4685574896292153
1986	0.44465218104969745
1987	0.5296942215811158
1988	0.6371919370801088
1989	0.6733863138386761
1990	0.538763108512704
1991	1.0329314823185676
1992	0.9290369500255568
1993	0.9917211319098392
1994	1.037598870391797
1995	1.1055888425157132
1996	1.1727816446679793
1997	1.3256044243377432
1998	1.272448184802653
1999	1.2299302352155954
2000	1.5645249286944718
2001	1.852120319546561
2002	1.7392518164760042
2003	1.5947691384414566
2004	1.4840935384700007
2005	1.922217871214388
2006	1.9744965459237294
2007	1.7041871290325374
2008	1.5058755737488623
2009	1.751499623126877
2010	1.4572818706760216
2011	1.6004630742622166
2012	1.6083640429568524
2013	1.7523963007040584
2014	1.7304712010153607
2015	1.4104333548299042
2016	1.1132768346078903
2017	1.4321941266505651
2018	2.5389962693209442
2019	2.5396057833606864
2020	2.7740231122310886
2021	3.9651573531951407