Year	% of GDP
1970	3.029891516441314
1971	3.4633366262170955
1972	4.2050630217600276
1973	5.755057335665176
1974	22.55649449884634
1975	16.48518976410822
1976	14.895524624079234
1977	18.588119372725522
1978	14.915974970720653
1979	30.982529381256576
1980	20.164317696451352
1981	5.475203866193819
1982	3.8358103961731524
1983	6.701278596450095
1984	9.493987392351588
1985	10.14040641196816
1986	6.577597512137137
1987	9.232366920284266
1988	8.638120056880808
1989	15.587436378382343
1990	17.562156428135623
1991	12.904263029522957
1992	13.996751661140884
1993	19.780326001676322
1994	18.88685839437546
1995	18.669618527371828
1996	18.46252043649514
1997	16.68147231832628
1998	10.630139187151686
1999	10.16056694712708
2000	19.16501531988297
2001	13.881052953247067
2002	11.816254730406495
2003	12.678975279692272
2004	13.493660127325938
2005	17.734268190090162
2006	16.49726804345721
2007	16.015463462956344
2008	17.789106164207798
2009	11.311033253259174
2010	14.206042979238406
2011	17.78145373419175
2012	16.08742080993549
2013	12.406814767030248
2014	9.912400690620608
2015	6.087629607645322
2016	6.293626766664772
2017	8.824118407970133
2018	9.956197370786667
2019	8.64548220480148
2020	6.026826472002593
2021	9.874726863114445