Year	% of GDP
1970	3.370763474200002
1971	2.9633947825473546
1973	4.2961556132231005
1974	3.94835991226343
1975	4.271336071395666
1976	3.8409946213405832
1977	5.368712220924953
1978	4.7805342211705035
1979	4.344683284102854
1980	4.69102410933205
1981	4.8247017087475905
1982	6.873764109064296
1983	4.7295796510609796
1984	4.139314227363568
1985	3.2081160396206565
1986	4.38269900211441
1987	3.9087085124703065
1988	4.183900917460434
1989	4.267943528779122
1990	4.80005840687001
1991	4.393981506945706
1992	6.564927166302656
1993	5.587920830656918
1994	7.833232053028653
1995	9.958836771754987
1996	9.034886338799637
1997	8.098866796062023
1998	7.915498511348976
1999	5.24422291217683
2000	4.9401581724228985
2001	4.942478354111198
2002	5.422944883129147
2003	7.544304097469806
2004	5.7662767007365225
2005	5.342375490531663
2006	4.66489394092099
2007	5.615002920294489
2008	5.730426479419965
2009	5.789369972120011
2010	4.943625068048669
2011	5.191217579542428
2012	5.74534552821649
2013	5.526665603322529
2014	5.7787428220570165
2015	6.238152996959298
2016	6.512744714516235
2017	5.995534608058637
2018	4.127401380154377
2019	3.782401977628223
2020	4.116798204386431
2021	3.9338698216848655